B6: EVOLUTION + NATURAL SELECTION + SPECIATION

Question 1

What is the theory of evolution?

Answer 1

the theory that all species have evolved from simple life forms that first started to develop 3 bil + years ago

Question 2

Who proposed the theory of evolution by natural selection?

Answer 2

Charles Darwin

Question 3

What was the name of the book in which Darwin published his theory of evolution in 1859?

Answer 3

‘On the origin of species’

Question 4

What was Darwins theory of evolution by natural selection?

Answer 4

the theory that over time there is a gradual change of inherited characteristics in a species due to one characteristic being more useful and making the organism better suited to their environment

Question 5

What are the stages of natural selection?

Answer 5

-mutation
-variation
-best suited to a changing environment (competition)
-survival and reproduction
-inheritance

Question 6

What is speciation?

Answer 6

when a new species is formed because the phenotype of a population of a species can become so different that they can no longer interbreed to produce fertile offspring

Question 7

What is the process of speciation?

Answer 7

-isolation (physical barrier separates populations into separate gene pools)
-separate population exposed to different environments
-natural selection occurs
-evolution of a new species (can no longer breed to produce fertile offspring)