Biology

Biology, 01.10.2019 14:30, didraga777

For fertilization to occur, the sperm has to penetrate through the and the cumulus oophorous.

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Biology, 02.08.2019 03:10, ana2896

Fish, frogs and most aquatic annimals release their eggs and sperm into the water for fertilization. however, may organisms, specially terrestrial animals, have evolved internal fertilizatioon. all of the following are advantages of internal fertilization, except: a. fertilization can occur outside of water but inside the organism b. once inside, the embryo may continue to develop internally c. it requires the evolution of fewer specialized structures for reproduction d. it makes it more likely that the eggs and sperm will find each other

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Biology, 04.10.2019 22:30, decapria

Self-fertilization is avoided in sponges because a. there is no way for sperm to enter the sponge. b. the sperm do not possess the enzyme needed to penetrate the egg. c. sperm and eggs are not produced at the same time. d. none of the above is true; self-fertilization is common in sponges.

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Biology, 07.10.2019 03:30, 5nathanomadrid5

As opposed to external fertilization, internal fertilization ensures that a. all of the sperm will fertilize eggs. b. sperm and egg will be released simultaneously. c. the number of sperm and eggs produced will be equal. d. only the fittest of sperm and egg combinations will survive. e. sperm will be protected until they can unite with the eggs.

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