Question

Answer these questions.	Describe the evidence for A, C and D.
C. How does natural selection produce change in a population of mice?	What evidence supports the conclusion that natural selection has occurred?
D.How does variation in the environment affect natural selection?	What evidence supports effects of the environment on natural selection?

Answer 1

Answer- Natural selection is an evolutionary process which leads to sexual selection of better adaptable individuals as compared to less adapted individuals in the changing environmental conditions. This leads to increase in number of individuals with a certain phenotype as compared to others in their population.

C. Answer- Impact of natural selection on mice population is explained here-

This can be observed in population of rock pocket mise living in Southwest America. Mice living on light-colored sand tend to have light-colored coats, while mice living on patches of dark-colored rock have mostly dark-colored coats. Their respective coat colours have lead to their greater selection in that particular area because it helps them in camouflage.

The mice with light colour or not naturally selected on dark region because they can't camouflage effectively in that area.

D. Answer- Impact of environment on natural selection-

Environment greatly affects natural selection. Usually only those individuals are naturally selected which are better adapted to their environment. For evidence we can suggest that in cold areas only those individuals can survive which have better adaptability in coldcold environment, adaptability includes thick fur.