3.6

Question 1

Mutation

Answer 1

Random change to genetic material of an organism

Spontaneous,are only source of new alleles

Question 2

Factors that increase rate of mutation

Answer 2

Radiation eg uv light
Chemicals such as tobacco smoke

Question 3

Mutation/adaptation

Answer 3

New alleles from mutation result in a plants /animals becoming better adapted to their environment

An adaptation is a inherited characteristic that makes an organism well suited to its environment

Question 4

3 Types of adaptation

Answer 4

Structural-physical differences in biological structure (eg neck length)

Behavioural - differences between h patterns or activity

Physiological

Question 5

When does natural selection occur

Answer 5

When there are selection pressures

Question 6

Examples of selection pressures

Answer 6

Predation
Disease
Food availability

Question 7

What is speciation

Answer 7

Evolution of new species

Speciation occurs if their is an isolation barrier

Geographical
Ecological
Behavioural

Question 8

What is speciation

Answer 8

Evaluation of a new species

Occurs if there is a isolation barrier

Question 9

3 types of speciation

Answer 9

Geographical
Ecological
Behavioural