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ICSE Class 10 Biology Question 14 of 20

Solved 2022 Semester 2 Question Paper ICSE Class 10 Biology — Question 14

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Question

Question 5(ii)

A mature mammalian erythrocyte lacks nucleus and mitochondria but is efficient in its functioning. Explain by giving suitable reasons.

Answer

Lack of nucleus and mitochondria helps erythrocytes in the following ways:

  1. Loss of nucleus makes the red cells biconcave, thus increasing their surface area to absorb more oxygen.
  2. Loss of mitochondria means that they cannot use the absorbed oxygen themselves.