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22/09/2020 1:41 pm
Topic starter
Which reproductive adaptation is characteristic of most terrestrial vertebrates but not of most aquatic vertebrates?
(a) External fertilization
(b) Internal fertilization
(c) Motile gametes
(d) External development
1 Answer
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22/09/2020 1:42 pm
(b) Internal fertilization
Explanation:
Most vertebrate animals that live on land have an adaptation that allows internal fertilization, whereby the male penis inserts sperm directly into the female body. This is advantageous since sperm need liquid to swim and the moist female reproductive tract provides this. Aquatic vertebrate animals live in water so sperm can easily be deposited in the water and swim to the female reproductive tract.