Darwinism explains all except:

Within each species there are variations.

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Variations are inherited from parents to offspring through genes.

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Organisms tend to produce more offspring than can survive.

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Organisms with better traits that overcome competition are best suited under the environment.

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Solution

The correct option is B Variations are inherited from parents to offspring through genes.
Darwin's theory states that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
One of the major drawback of Darwin's theory is the absence of knowledge on inheritance. The genetic basis of evolution, cause of variations was not included in Darwin's 'Origin of Species'.
It was only after the discovery of genes and traits by Mendel, genetics could be associated with evolution.
So, the correct answer is 'Variations are inherited from parents to offspring through genes'.

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Similar questions

The process by which variations enabling better survival are inherited, so that, an organism can reproduce and leave a greater number of offsprings is called:

Question 6
Characters that are transmitted from parents to offspring during reproduction show

(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations

Consider the following statements relating to evolution and answer the question.

(i) Organisms are products of a history of descent with modification.
(ii) Characteristics acquired by an organism during its lifetime are inherited by its offspring.
(iii) The goal of evolution is to adapt organisms to the environment.
(iv) Evolutionary change is brought about by natural selection.

Darwinism explains all of the following except

Q. It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short children and vice-versa. Are there factors other than genes, that can cause these variations?

Q. Assertion :As favourable variations are transmitted from generation to generation, successive generations become better adapted to the environment, more over, new adaptations may arise due to changing environment. In this way, the adaptive traits preserved by natural selection, will gradually change the characteristics of a species. Reason: This explains the origin of species.

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