3.4.4 genetic diversity and adaptation

Question 1

Directional Selection

Answer 1

When one extreme is selected to survive, for example high antibiotic resistance in bacteria

Question 2

Stabilising selection

Answer 2

The phenotypes with successful characteristics are preserved and the ones with greater diversity reduced.

Question 3

genetic diversity

Answer 3

total number of different alleles in the population

Question 4

Population

Answer 4

group of individuals of the same species living in the same habitat and are able to interbreed with each other

Question 5

A species consists of more than one population

Answer 5

yes it does!!!

Question 6

Niche

Answer 6

• species have a niche which is their role in the environment
• species with the same niche compete with eachother

Question 7

natural selection

Answer 7

the process in which the better adapted individuals survive and pass on their advantageous genes to future generations

Question 8

evolution

Answer 8

the process by which the frequency of alleles in a gene pool change over time as a result of natural selection

Question 9

Evolution via natural selection

Answer 9

• Variety of different phenotypes within a population
• environment changes so the selection pressure changes
• Individuals with advantageous alleles survive and reproduce
• Advantageous alleles passed on to offspring
• The frequency of the alleles in a population changes leading to evolution

Question 10

3 different adaptations

Answer 10

1. anatomical and physical
2. behavioural
3. physiological