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Darwinism

Natural selec...

Question

Natural selection directs evolution as it results in adaptations in a given population.

A

True

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B

False

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Solution

The correct option is B False
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration and genetic drift. Darwin's grand idea of evolution by natural selection is relatively simple.
Natural selection is the driving force of evolution. Variants that are best suited to the environment are the most likely to survive and reproduce, so these variants are more prevalent in subsequent generations.

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Q. Read the following statements and choose correct answer from codes given below:
I. The outcome of evolutionary process is the adaptation of an organism to its environment.
II. The evolution is the property of population and not of individuals.
III. Natural selection is the evolutionary force.
IV. According to Weismann the changes occurring both in germplasm and somatoplasm are heritable and play an important role in evolution.

Q. Change in frequency of alleles in a population results in evolution as proposed by :

Q. (A)The effects of genetic drift are most apparent in small populations.
(B)Evolution and natural selection is most prominent in populations having no variations.

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. Which of the following statements are incorrect regarding evolution?
A. Evolution is the sudden and continuous change in the characteristics of an individual only
B. Every kind of change is not an evolution
C. Evolution is the cumulative changes in a population over generations
D. Natural selection resists evolution
E. Mutation is essential to evolution

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