Topic 4

Question 1

Natural selection

Answer 1

Random mutation = new alleles
New allele increase survival in environment- more likely to reproduce
Advantageous allele pass on to next gen
Over many generations allele frequency increase in pop

Question 2

Directional selection

Answer 2

One extreme favoured
Change in environment
Model trait changes
Antibiotic resistance

Question 3

Genetic diversity

Answer 3

Number of diff allele in pop

Question 4

Evolution

Answer 4

Change in allele frequency over many generations

Question 5

What is courtship behaviour essential for

Answer 5

Specices recognition
Recognise oppositive sex
Successful mating
Synchronises mating behaviour- sexual mature

Question 6

What is courtship behaviour

Answer 6

Sequence of actions
Unique to each species
Helps identify members

Question 7

How does courtship behaviour ensure survival of offspring

Answer 7

Form pair bond
Choose a strong healthy mate

Question 8

What is a hierarchy

Answer 8

Smaller group arranged with larger groups
No overlap between groups

Question 9

Binomial species

Answer 9

First name species second name species

Question 10

Species diversity

Answer 10

Number of diff species and individuals within each species in communication

Question 11

Species richness

Answer 11

Number of different species in a community