Extract embryonic membrane like amnion and chorine appeared for the first time:
Correct answer: B. Reptiles
- A. Amphibians
- B. Reptiles
- C. Birds
- D. Fish
Explanation
Embryonic membranes like the amnion and chorion first appeared in reptiles, making option B the correct answer. These membranes are part of the amniotic egg, a key adaptation that allowed reptiles to reproduce on land. Birds also have similar adaptations, but they evolved from reptilian ancestors, not the other way around. Options A, C, and D are incorrect because they do not align with the evolutionary development of embryonic membranes in animals.
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About Embryonic Development
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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