B5.2.1

Question 1

What is evolution

Answer 1

Evolution is the gradual change in a species over time.

Question 2

What has evidence lead scientists to believe

Answer 2

That life began with LUCA

Question 3

How do organisms evolve

Answer 3

Through the process of natural selection.

Question 4

What is the first stage of natural selection

Answer 4

Organisms in a species show variation - this is caused by differences in their genes.

Question 5

What is the second stage of natural selection

Answer 5

The organisms with the characteristics that are best adapted to the environment survive and reproduce. Less well adapted organisms die. This process is known as survival of the fittest.

Question 6

What is the third stage of natural selection

Answer 6

Genes from successful organisms are passed to the offspring in the next generation. This means offspring are likely to possess the characteristics that made their parents successful.

Question 7

What is the fourth stage of natural selection

Answer 7

This process is then repeated many times. Over a period of time this can lead to the development of new species.

Question 8

What is evolution

Answer 8

Evolution is a very slow process as it occurs over many generations.