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24 April, 15:22

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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  1. 24 April, 15:58
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    Self-fertilization is avoided in sponges because : sperm and eggs are not produced at the same time
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