Multiple choice general knowledge science & technology

How is a bird's blood different from a human's?

  1. The red blood cells of birds have a nucleus

  2. Birds do not have any white blood cells

  3. Birds have spherical red blood cells.

  4. The platelets of birds are more efficient
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A Correct answer
Explanation

Bird red blood cells retain their nucleus, unlike mammalian red blood cells which lose their nucleus during development to make more space for hemoglobin. This is a key evolutionary difference between avian and mammalian blood.

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