Solution: Only variants provide an advantage to individual creatures that will survive in a community, according to the statement. Variations that promote heat resistance in bacteria, for example,...

Solution: Inheritance of equal numbers of chromosomes from both parents ensures equal genetic contribution of male and female parents in progeny. Although there are 23 pairs of chromosomes, not all...

Solution: Because of the following factors, sexual reproduction results in a number of viable variations: (a) A mistake in DNA copying (though it was rare) (b) At the moment of sex cell development,...

Solution: Stanley L. Miller and Harold C. Urey's experiment, undertaken in 1953, revealed evidence for the creation of life from inanimate substances. They produced an artificial atmosphere that...

Solution: Fossils provide evidence for: (a) The organism in question and its paleobiology (b) Even an organism's behaviour can be deduced to some extent. (palaeontologists, for example, discovered a...

Solution: The colour of a dog's coat is determined by a set of genes. There are at least eleven known sequence series that determine a dog's colour (A, B, C, D, E, F, G, M, P, S, T). Each of a dog's...

Solution: Homologous organs are those that share the same basic structural architecture and origin, but perform different roles. Human forelimbs and bat wings, for example, have anatomical...

Solution: Classification and evolution are two topics of biology that are closely intertwined. Evolution is concerned with how organisms evolve. While classification is concerned with determining...

Solution: To determine whether an attribute is dominant or recessive, you must have knowledge of at least three generations. As a result, determining whether a characteristic is dominant or...

(a) A Chinese school-boy. (b) A chimpanzee. (c) A spider. (d) A bacterium. Solution: The correct answer is (a). Humans and chimps are linked since they are both members of the same order (Primates)...

(a) Our arm and a dog’s fore-leg. (b) Our teeth and an elephant’s tusks. (c) Potato and runners of grass. (d) All of the above. Solution: The correct answer is (d). Homologous organs have the same...

(a) TTWW (b) TTww (c) TtWW (d) TtWw Solution: The correct answer is (c) TtWW TtWW could be a result of the tall parent's genetic makeup. Half of the progenies are short, implying that the parent...

Solution: Environmental pressures and needs influence body designs. As a result, we can't say that one organism has a superior body than another. Fish, for example, have acquired a streamlined...

Solution: Humans differ in color and appearance. Still their genetic makeup is the same as that of every other human. One theory for our significant variations is that it is the result of...

Solution: Fossils are the remnants of extinct animals, plants, and other species that lived millions of years ago. These fossils provide information about a variety of extinct species as well as...

Solution: Because they do not share a common ancestor, the wings of a butterfly and a bat cannot be considered homologous organs. Despite the fact that both structures aid in flight, they have...

Solution: Let's look at the case of humans and chimps. Chimpanzees are capable of expressing a wide range of emotions, such as laughing or smiling. This was previously regarded to be a human-only...

Solution: Geographic isolation is usually not a key effect in plant pollination. This is because no new feature will become part of the genetic makeup of a self-pollinating plant species. However,...

Solution: The following are factors that could lead to the emergence of a new species: (a) The term "mutation" refers to the process of changing one's (b) Genetic drift is a term used to describe...

Solution: The genetic pool of the species reduces as the size of the tiger population decreases. As a result, the number of mutations that can be introduced into the tigers' genetic composition is...

Solution: Because alterations in the DNA of germ cells do not mirror those acquired during a lifetime So, the traits gained during that lifetime cannot be passed down to subsequent generations. A...

Solution: In a population, an individual attribute could increase in one of two ways:- (a) Natural selection: if a trait is beneficial to a population, it will naturally increase. Mosquitoes that...

Solution: Males determine the sex of a child in humans. XX chromosomes are found in males, while XY chromosomes are found in females. As a result, if:– (a) The X chromosomes of the male and female...

Solution: It is not possible to establish which traits are prevalent — blood group A or O – based on the information available. In ABO blood, blood type A is always dominant, while blood type O is...

Solution: Through his dihybrid cross experiment, Mendel demonstrated that characteristics are inherited independently. He used two traits in his experiment, namely seed shape and seed colour. Yellow...

Solution: Through his mono-hybrid cross studies, Mendel demonstrated that characteristics can be either dominant or recessive. He conducted the experiment by crossing tall (TT) and dwarf (tt) pea...

Solution: The species' genetic variants allow it to better adapt to changes in its environment. Furthermore, it is a crucial force in evolution since it enables for natural selection to raise or...

Solution: Characteristic B is more likely to emerge early than trait A since it has already existed and replicated in a bigger percentage of the population.