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The Modern Theories of Evolution

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Question

According to Neo-Darwinism natural selection operates through

A

Variations

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B

Reduction in population of weaker organisms

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C

Differential reproduction

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D

Natural selection operates on dispute among organisms

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Solution

The correct option is C
Differential reproduction

Differential reproduction is the idea that those organisms best adapted to a given environment will be most likely to survive and reproduce giving rise to young ones of their own kind. Mendel's genetic principles and theories were combined to give Darwin's theory a better form and was called "Neo Darwinism".

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Q. According to Neo-Darwinism, natural selection operates through

Q. Darwin and Wallace’s theory of evolution by natural selection failed to explain how
Statement 1: Nature operates to reduce variations in a population every generation.
Statement 2: New genetic variations can appear in a population every generation.
Statement 3: Variations lead to evolution, useful variations are transmitted to the next generation and other variations are eliminated.

Choose the correct option

Q. Select the mismatched pairs.

(i) Hugo de Vries - mutations are sudden changes
(ii) Lamarck - nature selects organisms with favourable variations known as natural selection
(iii) Coacervates - group of organic compound
(iv) Darwin - organs develop more if used and will be removed if disused

Q. Select the mismatched pairs.
(i) Hugo de Vries - Mutations are sudden, random changes
(ii) Lamarck - Nature selects organisms with favourable variations and this mechanism of evolution is called natural selection
(iii) Ichthyosaurs - Reptiles
(iv) Darwin - Organs develop more if used and will degenerate if disused

Q. According to Darwin, all species evolved from common ancestor through variation and natural selection.

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