Multiple choice

Allantois of the mammalians do not help in:

  1. nutrition

  2. excretion

  3. respiration

  4. protection
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The allantois is an extraembryonic membrane in mammalian embryos that functions in nutrient transport from the yolk sac, waste storage (excretion), and early gas exchange (respiration). Protection is primarily provided by the amnion and chorion, not the allantois.

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