Sagot :
Answer:
During sexual reproduction in animals, a haploid sperm and unites with a haploid egg cell to form a diploid zygote. ... After birth or hatching, the animal develops into a mature adult capable of reproduction. Some invertebrates reproduce by self-fertilization, in which an animal's sperm fertilizes its own eggs.
Answer:
D. It is made up of only one cell.
Explanation:
A Zygote is when a sperm cell and egg cell fused resulting in one cell.
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