Analysis of test questions: analysis: the creatures in nature, through fierce competition for survival, the fittest survive and the unsuitable are eliminated, which is natural selection; Darwin's theory of natural selection originated from Darwin in 1859.

The Origin of Species is an amazing work published in 2000, which mainly contains four contents: over-reproduction, survival competition (also called survival competition), heredity and variation, and survival of the fittest.

Answer: Darwin of 1859.

The book Origin of Species, published in 1920, puts forward the theory of natural selection. This theory, together with the law of conservation and transformation of energy and cell theory, is regarded as one of the three major discoveries of natural science in the19th century. Pasteur was a French microbiologist, known as the father of microbiology, Mendel was the founder of genetics, and Newton was a British physicist.

So choose: B.

Comments: This question examines the proposer of natural selection theory: Darwin.