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riveraj22 riveraj22
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11 years ago
What event in organogenesis shows the similarities in embryonic development of amphibians, reptiles, and mammals?

a. A series of "master genes" are turned on in human embryos but not the others.  
b. They all pass through an embryonic stage in which they have tails and webbed fingers and toes.  
c. Transcription and translation occur in the human embryo.  
d, A three-layered gastrula forms in humans but not amphibians or reptiles.
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#1
11 years ago
It reminds of the famous quote from my biology teacher who keeps on repeating this. Ontogeny repeats phylogeny. Anyway, the answer is b.
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#2
11 years ago
d, A three-layered gastrula forms in humans but not amphibians or reptiles.
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#3
11 years ago
b
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michaelmrsmichaelmrs
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11 years ago
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#5
11 years ago
Answer is B:

They all pass through an embryonic stage in which they have tails and webbed fingers and toes.
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