Adaptations and Evolution

Question 1

anatomical adaptations

Answer 1

structures that an organism has that helps them survive or reproduce

Question 2

physiological adaptations

Answer 2

features of an organisms body chemistry that help them survive or reproduce

Question 3

behavioural adaptations

Answer 3

actions by an organisms that help them to survive or reproduce

Question 4

natural selection

Answer 4

the mechanism by which organisms change over time as they adapt to their changing environments.

Question 5

evolution

Answer 5

a change in allele frequency in a population over time

Question 6

the process of natural selection

Answer 6

1. a new allele is introduced through mutations
2. a change in the environment causes a change in selection pressure
3. an allele which was previously of no advantage now becomes favourable
4. organisms with the allele are more likely to survive and reproduce
5. their offspring are more likely to have the allele s becomes common in the population

Question 7

gene pool

Answer 7

all the alleles of all the genes in a population at a given time

Question 8

genetic diversity

Answer 8

the variety of alleles in a gene pool