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Imagine that you are a paleontologist and have discovered a 375-million-year-old transitional species between fish and the first legged animals. This species reveals that the evolution of hind legs began as enhanced hind fins.
-Upon moving from the water onto land, which of the following would be necessary to ensure continued reproductive success on land?
A)a thick, waxy ectoderm
B)external fertilization
C)elongated flagella
D)evolution of extraembryonic membranes
E)formation of an acrosome on sperm cells

Question

Quizplus · Accepted Answer

The evolution of extraembryonic membranes is necessary for reproduction on land as it allows for the protection and nourishment of the embryo outside of an aquatic environment, which is crucial for terrestrial life.

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