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CBSE Class 10 Science Question 5 of 20

Solved 2022 Term 2 Question Paper CBSE Class 10 Science — Question 5

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Question 5(a)

What is variation ? List two main reasons that may lead to variation in a population.

Answer

The small differences among the individuals of the same species are called variations. Variation are very important in population as they ensure the survival of the species.

Two main reasons that may lead to variation in a population are:

  1. The DNA copying mechanism is not absolutely accurate, and the resultant errors are a source of variations in populations of organisms.
  2. The sexual mode of reproduction incorporates a process of combining DNA from two different individuals during reproduction which creates variation.