3.2 Natural Selection

Question 1

What are selection pressures?

Answer 1

Factors which affect the survival of organisms in an environment

Question 2

Give some examples of selection pressures

Answer 2

Predation, availability of food.

Question 3

What can a mutation lead to

Answer 3

An advantageous allele

Question 4

Describe the process of natural selection

Answer 4

-Varation occurs within environment due to different organisms having different alleles. This happens via mutation
-Conditions in an environment change which adds a selection pressure.
-Organisms with the advantageous allele will reproduce as pass allele on to offspring, survival of fittest.
-This results in an increase of allele frequency in population.

Question 5

What are the three kinds of adaptations organisms occupy niches by

Answer 5

1-Behavioural
2-Anatomical
3-Physicacal

Question 6

What is meant by behavioural

Answer 6

These are actions by the organism which help them to survive or reproduce.​

Question 7

What is meant by anatomical

Answer 7

These are adaptations which are structures which can be observed or seen when an organism is dissected.​