B6: Evolution

Question 1

Who can up with the theory of evolution by natural selection?

Answer 1

Charles Darwin

Question 2

What did Darwin concluded

Answer 2

That the organisms with the most suitable characteristics for the environment would be more successful competitors and more likely to survive.

Question 3

What are the steps of evolution?

Answer 3

1) a mutation occurs / variation is seen
2) those with the new characteristic are more likely to survive
3) those with the characteristic reproduce with each other
4) the beneficial characteristic is passed on to their offspring

Question 4

What is speciation?

Answer 4

Over a long period of time, the phenotype is organisms can change so much because of natural selection, that a completely new species is formed.

Question 5

When does speciation happen?

Answer 5

When populations of the same species change enough to become reproductively isolated - meaning they can’t interbreed to produce fertile offspring.

Question 6

What is extinction?

Answer 6

When no individuals of a species remain.

Question 7

Why do species become extinct?

Answer 7

The environment changes to quickly (destruction of habitat)
A new predator
A new disease
Can’t compete with another species for food
A catastrophic even happens that kills them all