(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...