Human Bio Unit 2 - Natural Selection

Question 0

Define change/pressure

Answer 0

A change happens in the organisms environment

Could be a new predator or change in temperature

Question 1

3 parts of natural selection

Answer 1

Change/pressure

Variation

Fittest survive

Question 2

Variation

Answer 2

Offspring are born with different characteristics

Question 3

Define “fittest survive”

Answer 3

The organisms best suited to their environment are more likely to survive

Then they can reproduce and it carry on with the characteristics their offspring inherit

Question 4

Evidence for natural selection

Answer 4

Antibiotic resistance in bacteria

Peppered moth

Question 5

Ways that 2 new species can come from a common ancestor

Answer 5

Mutation occurs
Or
Isolation

Question 6

Isolation (2 new species)

Answer 6

Geographical separation

Reproductive separation

Question 7

Geographical separation

Answer 7

When members of the same species find themselves separated by something like a mountain or on different islands

Question 8

Reproductive separation

Answer 8

When there is a difference of either a courtship ritual or mating period between members of a species