Question

explain the theory of evolution ​

Answer 1

Answer

Theory of evolution

➡ A species is a population of organisms that interbreeds and has fertile offspring. Living organisms have descended with modifications from species that lived before them. More organisms are produced than can survive because of limited resources.

➡In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time.

➡The theory of evolution is a shortened form of the term “theory of evolution by natural selection,” which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.

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Answer 2

Answer:

Darwin's theory of evolution is based on five key observations and inferences drawn from them. These observations and inferences have been summarized by the great biologist Ernst Mayr as follows:

1) Species have great fertility. They make more offspring than can grow to adulthood.

2) Populations remain roughly the same size, with modest fluctuations.

3) Food resources are limited, but are relatively constant most of the time.

From these three observations it may be inferred that in such an environment there will be a struggle for survival among individuals.

4) In sexually reproducing species, generally no two individuals are identical. Variation is rampant.

5) Much of this variation is heritable.

Explanation:

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