Answer:
To reach and fertilize an egg, sperm must move — wriggling and swimming through a woman's cervix, uterus and fallopian tubes. This is known as motility. You're most likely to be fertile if at least 40% of your sperm are moving.
Explanation:
<span>B. the complementarity of DNA and RNA
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Answer is : desert conditions
Dependent would be amount of colds.
Controlled would be amount of vitamin C taken.
Independent could be the fact that vitamin C will be taken daily.
