Biology- Unit 3

Question 1

What is the order of classification?

Answer 1

Kingdom
Phylum
Class
Order
Family
Genus
Species

Question 2

What does species richness mean?

Answer 2

The number of different species in a habitat

Question 3

What does genetic diversity mean?

Answer 3

A measure of the genetic variation found in a species- the number of alleles in a gene pool

Question 4

What are the methods of conservation?

Answer 4

Ex-Situ
Captive breeding programmes
Seedbanks

In-situ
Education programmes
National parks

Question 5

What is a niche?

Answer 5

The niche of a species is its role within the environment

Question 6

How have organisms adapted to their environment?

Answer 6

Anatomical adaptations
Behavioural adaptations
Physiological adaptations

Question 7

Describe evolution via natural selection

Answer 7

1) A variety of phenotypes exist within a population
2) An environmental change occurs and results in selection pressure changes
3) Advantageous alleles are passed down
4) Over time, the frequency of alleles in a population changes