Question

Mention Darwin’s two major contributions to evolutionary ideas.

Answer 1

Answer:

1 struggle for existence

2 variation

Answer 2

Answer:

       Darwin’s two major contributions to evolutionary ideas

• Darwin stated that evolution changes with time and is a slow and gradual process.
• Darwin in his theory of evolution proved that natural selection takes place through variation, inheritance and depends on the rate of growth of population and differential survival and reproduction.
• He proved that inheritable phenotypic variations exist among each individual.
• He stated that new species can arise if reproductive isolation takes place.
• He strongly suggested that the individuals who can survive environmental changes are those who are with inherited traits.