Once the sperm cells are formed, the are stored in the epididymis, where they are temporarily stored while they mature.
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The answer to this would be d. :)
In light-dependent reactions, the energy from sunlight is absorbed by chlorophyll and converted into chemical energy in the form of electron carrier molecules like ATP and NADPH. Light energy is harnessed in Photosystems I and II, both of which are present in the thylakoid membranes of chloroplasts.
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The repressor protein blocks the genes from making mRNA.