1. Name the process being studied. 2. Explain the process named above in (a). 3. Why was the pot covered with a plastic sheet? 4. Suggest a suitable control for this experiment. 5. Mention two ways...
1. Name the process intended for study. 2. Define the above mentioned process. 3. When the weight of the test tubes A and B is taken before and after the experiment, what change is...
1. What is the purpose of keeping CaCl2 vials inside the cup? 2. After few hours CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason....
1. Name the colour of dry cobalt chloride paper. 2. Is the experimental leaf a monocot or a dicot? Give a reason to support your answer. 3. Why are glass slides placed over the dry cobalt chloride...
1. Name the phenomenon being demonstrated. 2. What is the purpose of putting oil in the test tube? 3. What is the purpose of the spring balance in the set-up? 4. Would it make a...
(C) coated on both surfaces(D) left uncoated.All the four leaves A, B, C and D were left in a room for about 24 hours.1. Which leaf would become most limp? Why? 2. Which leaf would show least...
(a) Intensity of light: During the day, the stomata is open to facilitate the internal CO2 distribution of photosynthesis. At night it closes. Therefore, most transpiration occurs during the day....
The leaves of certain plants show water droplets on their sides in the morning. This is especially true for plants that grow in humid climates. The moist environment interferes with breathing while...
Forests have a large number of plants and trees. Plants therefore lose water in the form of daily water in the atmosphere through transpiration. A tree loses more than 30 gallons [30 L] of water a...
Factors pacing up the rate of transpiration: 1. Intensity of sunlight 2. Temperature 3. Velocity of wind 4. Humidity
Lenticels are a special opening from the old stem instead of stomata. This allows the diffusion of respiratory gases and photosynthesis. Lenticels do not close. They are always open....
A Potometer is an instrument that measures the amount of water consumed by a plant and this water intake is almost equal to the water lost through transpiration. The knife is sharpened and the twig...
a. Name the region in the kidney where the above structure is present? b. Name the parts labelled 1, 2, 3, and 4. c. Name the stages involved in the formation of urine. d. What is the...
(a) Define excretion. (b) Name the functional units of the kidneys. (c) Why does the cortex of the kidney show a dotted appearance? (d) Mention two functions of the kidney. (e) Write two differences...
Parts indicated by the guidelines 1 to 8 are as follows: 1. Afferent arteriole from renal artery; 2. Efferent arteriole 3. Bowman’s capsule, 4. Glomerulus; 5. Proximal convoluted tubule with blood...
(a) Name all the organ-systems shown completely or even partially.(b) Name the parts numbered 1 to 5. (c) Name the structural and functional unit of the part marked ‘1’.(d) Name the two main organic...
(a) Is it a longitudinal section or a cross-section? (b) Name the parts numbered 1-5. (c) Which area/part (give its name and number given on the diagram) which contains the following: (i) Malpighian...
Solution – dialysis machine means an artificial kidney . From the radial artery the blood is led in the patients arm through the machine . Here the urea and excess salts are removed and the purified...
Solution - Ultrafiltration : it is a high pressure filtration through a semi permeable membrane in which the colloid particles are kept while the small size solutes and solvent are made to...
(b) Micturition (c) Renal pelvis (d) Urea (e) Osmoregulation Solution – (a) Ultrafiltration : it is a high pressure filtration through a semi permeable membrane in which the colloid particles are...
In a nephron, the _______ flows through the ________ under great pressure. The reason for this great pressure is that the ________ (outgoing) _________ is narrower than the __________ (incoming)....
Column I Column II (a) Bowman’s capsule (i) Renal artery (b) Contains more CO2 (ii) Regulates amount of and less urea water excreted (c) Antidiuretic hormone (iii) Renal vein (d) Contains more...
Solution - urea, creatinine, and uric acid are the main nitrogenous metabolic waste excreted out by mammals including human beings .
(b) Renal cortex and renal medulla (c) Renal pelvis and renal papilla (d) Urea and urine (e) Excretion and secretion Solution – difference : (a) Bowman’s capsule and malpighian capsule....
Solution – in summers to keep ourselves hydrated we drink a lot of water . Water in take is more but we urinate less number of times . But in winters we drink less and go to urinal more times . In...
Solution – if we donated one kidney to a needy person , then the left one kidney alone is capable to carry out our needs . The donor can live a normal life as before .
Solution – kidney removes the waste from the body . Along with this , it also regulates the composition of the blood . This is known as osmoregulation - it implies the regulation of osmotic pressure...
Solution – uriniferous tubule are small minute tubules located in the kidney . It comprises of proximal tube , the intermediate tube , the distal tube and the collecting duct . It receives impure...
Solution - Excretion plays an important role in maintaining the homeostatic condition of the body .There are numerous substances in our body that need to be removed regularly . if it is not...
(b) Henle’s loop (c) Ureter (d) Renal artery (e) Urethra Solution – functional activity : (a) glomerulus – filters plasma to produce glomerular filtrate (b) henle’s loop – reabsorbs water an calcium...
(b) Skin, liver, lungs, kidneys, excretion. (c) ADH, water, pituitary, osmoregulation, urine. (d) CO2, bile pigments, water, excretion, urea. Solution – The term common to all is ultrafiltration ....
Solution – correct sequencing of the terms are as follows : Afferent arteriole, glomerulus, efferent arteriole, capillary network, renal vein.Renal artery, kidney, ureter, urinary bladder,...
(b) The outer region of kidney containing the Bowman’s capsule. (c) The tuft of capillaries inside the Bowman’s capsule. (d) The part of kidney tubules where the term urine is first used for the...
Correct option - ( b ) Explanation – liver is responsible for the formation of urea
Correct option - ( c ) Explanation – sweating in real sense is not an excretory activity . While passing faecal matter , removing urea and carbon dioxide from the body are all excretory...
Correct option - ( a ) Explanation - proximal convoluted tubule reabsorbs the Maximum amount of water from the glomerular filtrate . Hence correct answer is proximal convoluted tubule
Correct option - ( c ) Explanation – excretion primarily involves removal of nitrogenous waste . It is chemical waste
Identify the types of blood vessels numbered 1 to 5.Where can such an arrangement be found as an example – in lungs or in heart walls? Solution – Identify the types of blood vessels numbered 1 to 5....
Name the cell labelled 1 b. Identify the phenomenon occurring in A. c. Mention two structural differences between 1 and 2 d. Name the process occurring in B and C and state the...
(a) Name the phase(b) Which part of the heart is contracting in this phase? Give a reason to support your answer.(c) Name the parts numbered 1 to 6. (d) What type of blood flows through the parts...
(a) Several hours after a meal containing a lot of protein, which vessel will contain the highest concentration of urea?(b) Which vessel would contain the highest concentration of amino acids and...
(a) When the liquid from the blood surrounds the cells, what is it called? (b) Name any one important component of the blood which remains inside the capillaries and fails to move out into the...
(a) Which part (state the number) represents the heart? Give reason in support of your answer.(b) Which numbers represent the following respectively?Aorta Superior vena cava Hepatic portal vein...
(a) Name the parts 1, 2, 3 and 4 indicated by guidelines. (b) Mention two structural differences between the parts labeled 1 and 2. (c) What is the main function of the parts labeled 1, 2 and 3...
Solution – by double circulation we mean that the blood flows twice in the heart before it complete one cardiac cycle . Diastole means when the heart relaxes and allows blood to refill each...
(d) Only the veins and not the arteries are provided with valves. (e) Atrial wall is less muscular than the ventricular wall.(f) The arteries are deep seated in the body Solution – The walls of the...
(a) The left ventricle has thicker walls than the right ventricle. (b) The walls of the right ventricle are thicker than those of the right auricle Solution – (a) The left ventricle has thicker...
Solution : function of tonsils – they tend to localize the infection and prevent it from spreading it in the body as a whole Function of spleen – Fights the germs invading the bloodControls the...
Solution - difference ArteryVeinBranchedUnitedThick and non muscular wallsThin and less muscular wallsLumen is narrowLumen is wideElasticity in wallsWalls are non – elasticNo valves in inner...
(a) Endothelium (b) Lymph nodes (c) Venule (d) Diastole Solution – explanation : ( a ) endothelium – inner most muscular wall of an artery or a vein (b) Lymph nodes – small round or bean shaped...
Solution – functions of blood – Transportation of oxygen and nutrients to the lungs and tissues .Formation of blood clots .Regulation of body temperature Brings waste products to the kidneys...
Solution – no it is not possible for the blood to clot under the skin . This is so because of presence of heparin which prevents the coagulation of the blood when inside .
(a) Rh factor (b) Universal donor (c) Diapedesis Solution – ( a ) Rh factor – its an inherited antigen usually found on the blood cells . People having it are Rh positive and those who do not have...
Solution - main steps in coagulation of blood Thrombokinase released by the injured tissue cells and plateletsThrombokinase with the help of calcium ions converts prothrombin of...
Solution – functions of blood plasma are – Take nutrients , hormones and proteins to other parts of the body Helps to remove the waste products Transportation of digested food from the alimentary...
SubstanceFromTo1. ……………LungsWhole body2. Carbon dioxide………..……………3. Urea………..…………..4. Digested carbohydratesIntestine…………..5. ………….…………..Target organs Solution – SubstanceFromTo1. OxygenLungsWhole...
Column A Column B (a) SA Node (i) Plasma (b) Defective haemoglobin in RBC (ii) Serum (c) Muscle fibres located in heart (iii) Pacemakers (d) The liquid squeezed out of blood (iv) Sickle cell anaemia...
Solution - The heart is located right in the center between the two lungs and above the diaphragm . The narrow end is pointed towards the left side . The powerful contraction at this end gives us a...
Solution – the LUBB is produced when atrio ventricular valve gets closed . The DUBB sound is produced when the semilunar valves at the roots of aorta and pulmonary artery get closed.
Solution – human circulatory system is double circulatory system . It has two separate circuits and blood passes via the heart twice : the pulmonary circuit and the systemic circuit .
(b) RBC and WBC (Structure) (c) Serum and Vaccine (Composition) (d) Erythrocytes and leucocytes (function) (e) Artery and vein (direction of blood flow) (f) Artery and vein (type of blood primarily...
Solution it is important to know the blood groups before transfusion . Before transfusion the blood should be matched , if it is similar only then it should be transfused . If not then it will give...
Solution – difference between white blood cells and red blood cells – White blood cellsRed blood cellsWith the help of pseudopodia ( produced by white blood cells ) they can squeeze through the...
Solution – a mature mammalian erythrocyte lacks nucleus and mitochondria to make place available to accommodate more hemoglobin and more oxygen molecules . This gives biconcave appearance to the red...
(b) Coronary artery: Heart::Hepatic artery:______ Solution – a) Lubb: Atrioventricular valve:: Dup: Semilunar valves (b) Coronary artery: Heart::Hepatic artery: liver
(b) A blood vessel which has small lumen and thick wall is _______. (capillary, lymphatic duct, artery, venule) © The valve which prevents the back flow of blood in the veins and lymph vessels...
(a) Any one vein which starts from an organ and ends in another organ besides the heart. (b) The kind of blood vessels which have no muscular walls. (c) Any artery which carries impure...
Solution : (a)Blood platelets : blood coagulation(b) Neutrophils : phagocytosis (c) Erythrocytes : transportation of gases (d) Lymphocytes : antibodies production(e) Bone marrow : destruction of old...
Correct option – ( c ) Explanation – first heart sound is heard because of the closure of bicuspid and tricuspid valve . While second heart sound is due to closure of atrioventricular and...
Correct option – ( d ) Explanation – the lymph nodes filter the pathogens and destroy them .This is their main function Hence correct answer is – destroy pathogens
(c) defective functioning of mitral valve(d) infection by a virus Correct option – ( b ) Explanation - chest pain due to an inadequate supply of oxygen to the heart muscle is called as angina...
Correct option – ( b ) Explanation – renal artery supplies the blood to the kidney . Veins take away the deoxygenated blood Hence correct answer is – renal artery
Correct option – ( c ) Explanation – while examining pulse the doctor presses the radial artery so as to listen how many times the heart pumps the blood in one minute . Hence correct answer is –...
Correct option – ( d ) Explanation – nearest organ to which heart supplies blood is heart itself . From heart oxygenated blood goes to heart itself and later to other organs Hence correct answer is...
Correct option – ( b ) Explanation -phagocytosis is the process in which bacteria are engulfed by the cells Hence correct answer is – phagocytosis
Correct option – ( a ) Explanation – agranulocytes are while blood cells and comprises of lymphocytes and monocytes Hence correct answer is - lymphocytes and monocytes
Name the plant hormone responsible for the above changes. Mention two characteristic features of this hormone. Solution - ( a) the plant hormone responsible for the above changes is...
geotropism refers to growing towards the gravity of the earth . Organs which grow towards the gravity are termed as positively geotropic and those growing against the gravity are known as negatively...
Solution – five plant growth hormone with their role are – AUXIN – by cell division it promotes growth of the stems , roots and fruits ....
(a) Hormone that stimulates growth by cell division. (b) Growth retarding hormone in plants. (c) Main auxin found in most plants. Solution – Hormone that stimulates growth by cell division –...
Phototropism, thigmotropism, hydrotropism and geotropism. Solution - phototropism is the movement towards light Thigmotropism is growing movement of plants in response to touch stimulus...
Solution - movement of the entire organism from one place to another is locomotion . In plants part movement is a result of growth as a response to various stimuli . Growth responses are slow and in...
(a) Thigmotropism and geotropism (b) Phototropism and chemotropism Solution – ( a ) Thigmotropism and geotropism Thigmotropismgeotropismdirectional growth movement of a part of the...
Column A Column B (a) Auxin (i) apical dominance (b) Gibberellin (ii) cell-division (c) Cytokinin (iii) fruit ripening (d) Ethylene (iv) Internodal elongation Solution – correct matching is Column...
(a) away from the stimulus (b) towards the stimulus (c) either towards or away from the stimulus (d) only towards water Correct option – ( c ) Explanation – tropic movement are directional movements...
(a) positively geotropic and negatively phototropic (b) positively geotropic and positively phototropic (c) negatively geotropic and positively phototropic (d) negatively phototropic and negatively...
(a) GA1 (b) GA2 (c) GA3 (d) GA7 Correct option – ( c ) Explanation - GA3 is the most common gibberellin . They are plant growth regulators and and helps in elongation of the...
(a) green banana (b) ripe banana (c) fresh potato tuber (d) green apple Correct option – ( b )Explanation – bananas which have ripened have high concentration of ethylene present in them . This is...
(a) base of the root (b) base of the shoot (c) shoot (d) meristematic region of the shoot Correct option – ( d ) Explanation – the meristematic region of the shoot produces auxins in abundance ....
(a) auxins (b) GA (c) ABA (d) cytokinins Correct option – ( d ) Explanation – the hormone which regulates the closure of the stomata is cytokinins .
(a) auxins (b) GA (c) cytokinins (d) ABA Correct option – ( a ) Explanation – auxin hormone is responsible for apical dominance in the plants
(a) Ethylene (b) ABA (c) Bromic acid (d) GA Correct option – ( d ) Explanation – plant senescence refers to aging in plant . The hormone in plant which inhibits is GA .
(a) Name the physiological process that releases the bubbles of oxygen.(b) Explain the physiological process as mentioned above in (a).(c) What is the purpose of keeping a snail in test-tube...
(a) What aspect of photosynthesis was being tested? (b) Why was the plant placed in the dark before beginning the experiment? (c) During the starch test, why was the leaf (1) boiled in...
Solution – diagram showing stomatal apparatus :
(a) What is objective of this experiment? (b) Will it work satisfactorily? Give reason. (c) What alteration(s) will you make in it for obtaining expected result? (d) Would you take any step before...
Solution : the steps are – Dipping of the leaf in boiling water to kill the cellsTo remove chlorophyll boil the leaf in methylated spirit . the leaf becomes hard and brittle To soften it place it...
(a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items.(b) What phenomenon do the think arrows A and B indicate respectively Solution – The gaps are as follows:...
(a) Guard cells(b) Cuticle(c) Mesophyll cells(d) Xylem tissue in the leaf veins(e) Phloem tissue in Leaf Veins(f) Stomata Solution - Guard cells – regulate the rate of transpiration by opening and...
To test the leaf for starch, the leaf is boiled in water to (1) ……………. It is next boiled in methylated spirit to (2) ……………. The leaf is placed in warm water to soften it. It is then placed in a dish...
Solution – Chlorophyll is the green colouring matter found in plants . These are minute oval bodies bounded by a double membrane . Chlorophyll is the key element in the process of the photosynthesis...
Solution : non green plants such as fungi and bacteria get their nourishment from decaying organic matter in the environment . Fungi and bacteria are decomposers that feed on dead and decayed...
(i) Grass → ………… Snake →…………… (ii)……….. → Mouse …………… → Peacock Solution : ( i ) Grass → ………… Snake →…………… Grass → rat → Snake → hawk (...
Solution : ( i ) light reaction –light plays a key role in light reaction . The phase is called as photochemical phase . The two steps in light reaction are : Step 1 – the chlorophyll is activated...
Solution : experiment to show that oxygen is released when plants are exposed to light Take a beaker containing pond water and place few aquatic plants in it covered by stemmed funnel .A test tube...
Solution : the upper surface of most of the leaves is more green and shiny than the lower one .This is because of more concentration of the chloroplasts and stomata in the upper layer . This helps...
Solution – in day time the plants undergo photosynthesis so it is not possible to show respiration in green plants at that time . Photosynthesis takes place in the day time and requires carbon...
Solution : the plant used for the experiment of the photosynthesis is placed in the dark in starting so as to remove the starch from the leaves . The plant is placed in the dark for 24 – 48 hours so...
Solution : photosynthesis is the only process which liberates oxygen in the environment . Life cant be imagined by the oxygen . All living organisms need oxygen to survive , It is the life line ....
Solution : difference between photosynthesis and respiration are – PhotosynthesisRespirationTakes place only in green plants and in photosynthetic bacteriaRespiration occurs in all living...
Solution : the correct order of the terms with regard to photosynthesis will be – (v) photons, (iii) grana, (i) water molecules, (iv) hydrogen and hydroxyl ions, (ii) oxygen
(a) The rate of photosynthesis continues to rise as long as the intensity of light rises. (b) The outside atmospheric temperature has no effect on the rate of photosynthesis. (c) If you immerse a...
(a) The site of light reaction in the cells of a leaf is……………… (cytoplasm, stroma, grana).(b) The chemical substance used to test the presence of starch in the cell of a leaf is…………… (CaCl2, iodine...
(b) Immediate product of photosynthesis is glucose. (c) Starch produced in a leaf remains stored in it...
(b) Light and dark reactions (products formed) (c) Producers and consumers (mode of nutrition) (d) Grass and grasshopper (mode of nutrition) (e) Chlorophyll and chloroplast (part of plant cell)...
(a) The category of organisms that prepare their own food from basic raw materials. (b) The kind of plastids found in the mesophyll cells of the leaf. (c) The compound which stores energy in the...
a) CO2 b) water c) both CO2 and water d) oxygen via air correct option – ( a ) explanation – carbon dioxide provides the oxygen in glucose during the process of photosynthesis .
a) remove chlorophyll from leaves b) remove starch from the leaves c) ensure that no photosynthesis occurred d) ensure that the leaves are free from starch correct option – ( d ) explanation –...
a) reduce carbon dioxide b) synthesise glucose c) activate chlorophyll d) split water molecule correct option – ( c ) explanation – the chlorophyll is activated by the light energy in the process of...
a) Carbon dioxide is reduced and water is oxidised b) Water is reduced and carbon dioxide is oxidised c) Both carbon dioxide and water are oxidised d) Both carbon dioxide and water are reduced...
a) continue to live, but will not be able to store food b) be killed instantly c) grow more vigorously because more energy will be available d) stop growing and die gradually of starvation correct...
a) breaking down water into hydrogen and oxygen b) emitting green light c) trapping light energy d) storing starch in the leaves correct option – ( c ) explanation – chlorophyll in a leaf is...
a) light intensity b) humidity c) temperature d) CO2 concentration correct option – ( b ) explanation - humidity does not affects the rate of photosynthesis
a) six b) twelve c) eighteen d) twenty-four correct option – ( b ) explanation -twelve water molecules are required in the chemical reaction of photosynthesis to produce one molecule of glucose...
a) starch is immediate product of photosynthesis b) glucose formed in photosynthesis soon gets converted into starch c) starch is soluble in water d) sugar cannot be used correct option – ( b )...
(i) Who launched this campaign and when? (ii) Mention some chief objectives of this campaign. Solution:- (i) The Swachh Bharat Abhiyan is a major cleanliness initiative launched by the Indian...
(i) Name the phenomenon and explain it. (ii) Enlist the sources that are responsible for the above mentioned phenomenon. (iii) List out the effects of the above phenomenon on humans. Solution:- (i)...
(i) Name the kind of pollution. (ii) List the sources of pollution. (iii) Mention any two harmful effects of this pollution. Solution:- (i) Noise Pollution (ii) Industrial machines, workshops,...
Solution:- (i) Sewage: The liquid waste from residential activities is referred to as sewage. It is made up of kitchen garbage, toilet waste, and other household waste. Small towns and villages...
Solution:- The Swachh Bharat Abhiyan is a major cleanliness initiative launched by the Indian government. Our Prime Minister, Shri Narendra Modi, formally launched it on October 2, 2014, at India...
Solution:- (i) The use of horns is prohibited. (ii) Loudspeaker restrictions, particularly at night. (iii) Avoiding the use of firecrackers
Solution:- Accidental petroleum spills in oceans or estuaries are known as oil spills. Overturned oil tankers, offshore oil mining, and oil refineries are all sources of spills. A great deal of...
Solution:- (i) Agricultural wastes (ii) Kitchen waste (iii) Sanitary waste
(i) Rivers contaminated with sewage. (ii) Too much gaseous exhausts containing CO2 and SO2. (iii) Pesticides such as DDT used in agriculture.’ (iv) Prolonged noise such as the...
Solution:- Reduce, Reuse, Recycle, Recover
peal of vegetables and fruits, metallic cans, broken plastic toys, broken glass cover, grass, paper, ball point pen refill. Solution:- The biodegradable wastes are peal of vegetables and fruits,...
(i) Rubber particles and dust raised by running motor vehicles are examples of ……………… pollutants. (ii) Too frequent exposure to ……………. in a medical diagnostic technique may damage chromosomes (iii)...
Column I Column II (i) Chlorofluocarbons (CFCs) (a) Global warming (ii) Flyash (b) Biodegradable (iii) Cow...
(i) A pollutant which is mainly responsible for causing acid rain. (ii) Any two chemicals leading to the formation of ozone holes. (iii) The chemical element which caused minimata disease in Japan....
Solution:- (b) Ozone
Solution:- (b) Disposing of corpses in rivers
Solution:- (d) The dust raised during road-cleaning
Country197119811991 A6.49.610.6 B15.715.715.3 Fill in the blanks: (a) Rate of growth of population of country ……………… has declined between years ……………....
Solution:- The term "population explosion" refers to the quick and large increase in global population over the previous few hundred years. It all started in the mid-nineteenth century. Two-thirds...
Solution:- (i) People should be made aware of the benefits of having small families as well as the drawbacks of having a large family. Education should change the orthodox view, which is to have at...
Solution:- (i) Food: Food is one of humans' most basic needs. True, humans have been developing better and better ways to produce more food, but this cannot keep up with the increase in population....
Solution:- (i) Children from small households, particularly first and only children, have greater levels of academic and personal accomplishment than children from bigger families. (ii) It is less...
Solution:- In India, the inverted red triangle has become a famous symbol representing family well-being. It is prominently displayed in all such offices and hospitals where free family planning...
Solution:- Yes, a similar operation might be performed on women. In women, the procedure is known as a tubectomy. Tubectomy involves opening the abdomen and cutting or ligating the fallopian tubes...
Solution:- The approximate Indian population according to the 1981 census is 683 million and it was 846 in 1991.
Solution:- (a) Tool making revolution. (b) Agricultural revolution. (c) Scientific industrial revolution.
Solution:- The majority of our society's rural population is still illiterate, uninformed, and believes in superstitions. They also have little understanding of how the human reproductive system...
Solution:- A population explosion is far more perilous than an atomic explosion since it causes a slew of serious difficulties that cast doubt on humanity's survival. The fastest-growing human...
Solution:- (i) Illiteracy: The majority of our society's rural population is still illiterate, uninformed, and believes in superstitions. They also have little understanding of how the human...
Solution:- (i) The financial costs of keeping a family together are smaller. (ii) Each child receives greater parental attention and educational benefits, which boosts her self-esteem in...
Solution:- The age restrictions for marriage by law for boys is 21 years and for girls is 18 years.
Solution:- The present rate of growth of the population of the world is around 1.05% and of India is 1.13%.
(a) Cow was the first domesticated animal. (b) Rapidly growing industries favoured population rise. (c) Present human population growth is following arithmetic progression. (d) Birthrate (natality)...
(a) Birth rate (b) Death rate (c) Population density (d) Exhaustible resource (e) Rate of growth of population Solution:- (a) The birth rate, also known as natality, is the number of live births per...
Solution:- The world's population is estimated to be at 7.7 billion people.
(a) Vasectomy is the surgical method of sterilisation in human males ………………………………… (b) Tubectomy is the placing of a diaphragm on the cervix………………………………….. Solution:- (a) True. (b)...
Solution:- For male Vasectomy For female Tubectomy
Solution:- the technical term for the statistical study of the human population of a region is Demography.
Solution:- (a) Per 1000 people per year
Solution:- (d) Use of antibiotics and prophylactic vaccinations
Solution:- (i) Part 1 represents Urinary bladder – It is used to store urine. (ii) Part 2 represents Ureter – It transports urine from the bladder to the urethra. (iii) Part 3 represents...
(a) Name the parts labeled A-D. (b) What will happen if the part B on both sides gets blocked? Solution:- (a) A represents Muscular wall of the uterus, B represents Oviduct, C represents Ovary, D...
Solution:-
(a) Name the parts ‘1’ to ‘5’ indicated by guidelines. (b) What term is given to the period of development of the foetus in the womb? (c) How many days does the foetus take to be fully developed?...
a. Identify the reproductive cells A and B b. Name the specific part of the reproductive system where the above cells are produced. c. Where in the female reproductive system do these...
a. Name the parts numbered 1-11. b. State the functions of the parts numbered 1, 2, 3, 5, 8 and 11. Solution:- (a) Seminal vesicles are represented in Part 1. Parts 2 depicts the prostate gland...
(a) Name the systems. (b) Name the parts numbered 1-10. (c) Describe the functions of the parts 3, 4, 5 and 6. Solution:- (a) Excretory system and Female reproductive system. (b) The kidney is...
Solution:- By considering the above clues, The total reproductive period = 45 – 13 = 32 years Then, Total eggs produced = 32 × 12 = 384 eggs
Solution:- The interstitial cells or Leydig cells create testosterone, which is the male reproductive hormone. Packing tissues between the coils of the seminiferous tubules are interstitial cells....
Solution:- The two testes are oval organs that are housed in the scrotum, a thin-walled skin sac. The testes are enclosed within the abdomen during the embryonic stage. When they do not descend into...
(a) Amnion (b) Placenta Solution:- The space between the amnion and the embryo is filled by amniotic fluid. 1. Protects the embryo from physical injury caused by jerks or mechanical shocks. 2....
Solution:- (1) Egg (ovum) – Unfertilised stage, released from an ovary (2) Zygote – Fertilised egg, 1-cell state. (3) Morula – A spherical mass of cells, resulting from the repeated division of the...
(a) Semen and sperm (b) Implantation and pregnancy (c) Follicle and corpus luteum (d) Amnion and allantois (e) Prostate gland and Cowper’s gland (the nature of secretion) (f) Identical twins and...
(a) Menarche and menopause (b) Cowper’s gland and prostate gland (c) Hymen and clitoris (d) Uterus and vagina (e) Efferent duct and sperm duct Solution:- (a) MenarcheMenopauseMenarche is the...
Solution:- Changes in a human male, (i) Development of Beard and moustache (ii) Voice becomes deeper Changes in human female, (i) Enlargement of breasts (ii) Development of high pitched...
(a) Hernia (b) Ovulation (c) Puberty Solution:- (a) The intestine can bulge into the scrotum through the inguinal canal due to pressure in the abdomen. (b) Ovulation occurs when the follicle...
Solution:- In young females, the hymen is a thin membrane that partially covers the vaginal opening.
Solution:- Primary Reproductive SystemAccessory Reproductive System1. The gonads (testes in males and ovaries in females) are the primary reproductive organs that create sex cells.1. All structures,...
Solution:- All structures, ducts, and glands that aid in the transmission and meeting of two types of sex cells, fertilisation, and the growth and development of the egg up to the delivery of the...
Solution:- The secondary sexual characters in the male are, (i) Distribution of hair on body and face (beard and moustaches) (ii) Stronger muscular built. (iii) Deep voice The secondary sexual...
(a) Inguinal canal (b) Prostate gland (c) Testis (d) Ovary (e) Oviduct Solution:- (a) Originally, the inguinal canal was used to allow the testes, as well as their ducts, blood vessels, and nerves,...
Solution:- The mixture of sperms and secretions from the seminal vesicles, prostate, Cowper's, and urethral glands is referred to as sperm.
(a) Foetus(i) Where is it contained? (ii) How does it differ from embryo? (b) Hyaluronidase(i) Is it an enzyme or simply a protein? (ii) What is its function? (c) Morula(i) What is this stage? (ii)...
Structure Function 1. Corpus luteum 1. …………………… 2. …………………….. 2. Produces male gametes in mass. 3. Placental disc 3. …………………… 4. …………………….. 4. Increases the force in uterine contractions 5....
(i) Fertilisation occurs in the vagina. (T/F) (ii) Uterus is also known as birth canal. (T/F) (iii) Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion. (T/F)...
(a) Oestrogen; progesterone; testosterone; prolactin. (b) Ovary; fallopian tube; ureter; uterus. (c) Seminiferous tubule; ovum; epididymis; sperm duct; urethra. (d) Sperm; implantation;...
(a) The body part in which the testes are present in a human male. (b) The part where the sperms are produced in the testes. (c) The fully developed part of the ovary containing a mature egg. (d)...
Column I Column II (a) Acrosome (i) An embryo which looks like human baby (b) Gestation (ii) Luteinizing hormone (c) Menopause (iii) Ovum producing cells (d) Foetus (iv) Semen (e) Oogenesis (v)...
(a) The onset of the reproductive phase in a female. (b) Rupture of follicle and release of ovum from the ovary. (c) Monthly discharge of blood and disintegrated tissues in human female. (d) Process...
(a) Implantation, ovulation, child birth, gestation, fertilization. (b) Coitus, ovum, sperm, sperm duct, urethra, vagina. (c) Sperm duct, penis, testes, sperms, semen. (d) Puberty, menopause,...
(a) Sperm; implantation; fertilization; ovum; afterbirth. (b) Relaxin; cervix dilates; amniotic sac ruptures; child birth; follicle. Solution:- (a) Sperm. (b) Follicle.
(a) The fluid surrounding the developing embryo. (b) The body part in which the embryo develops. (c) The membrane which protects the foetus and encloses a fluid. (d) The canal through which the...
(a) 270 days (b) 290 days (c) 280 days (d) 295 days Solution:- (c) 280 days
(a) energy (b) food (c) gene (d) chromosomes Solution:- (a) energy
(a) Uterus (b) Oviduct funnel(c) Fallopian tube (d) vagina Solution:- (c) Fallopian tube