Answer: lack ejaculation
Explanation: this is due to the fact that the sexual characteristics of an infant is underdeveloped. As the infant grows and reach adulthood, the body becomes able to produce sperm and also enables ejaculation to occur.
It can become any of these things, Gypsum, Calcite, Fluorite, or Apatite
Helicase: unzipping the DNA helix
Primase: synthesizing the RNA primer
DNA polymerase III: adding bases to the new DNA chain; proofreading the chain for mistakes
DNA polymerase I: removing primer, closing gaps, repairing mismatches
Ligase: final binding of nicks in DNA during synthesis and repair
Gyrase: supercoiling
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Cells contain a nucleus that holds instructions for the cell