Q.

‘Bonsai’ tree grows as dwarf due to pruning and shaping. But the seeds from this tree would produce offspring of normal size. Which of the following principles are proven wrong by this example?

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a

Survival of the fittest

b

Inheritance of acquired characteristics

c

Struggle for existence

d

Descent with modification

answer is B.

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Detailed Solution

Lamarck proposed theory of use and disuse; inheritance of acquired characteristics. According to this theory, any characteristic acquired by an organism in its lifetime should pass on to the offspring. In this example although the parent is dwarf (an acquired characteristic due to pruning), the offspring can grow full size. Hence the theory is proven wrong.

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