Match the following stages of development.
0:embryo|1:childhood|2:fetus|3:infant
Complete the following sentence.
Which best describes the formation of a zygote?
Complete the following sentence.
Match the following vocabulary words.
0:fertilize|1:zygote|2:uterus|3:conception|4:chromosomes|5:deoxyribonucleic acid|6:gene
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