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Frogs differ from humans in possessing:

1. paired cerebral hemispheres
2. hepatic portal system
3. nucleated red blood cells
4. thyroid as well as parathyroid

Correct answer: nucleated red blood cells

Solution

Frogs, like other non-mammalian vertebrates, have red blood cells that retain nuclei. Human red blood cells lose their nuclei during maturation, so this is a key difference.

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