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Biology
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Human Biology Study Set 1
Quiz 21: Development and Aging
Path 4
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Question 81
Essay
Labor is a highly coordinated event that requires the participation of numerous signaling molecules. Discuss how hormones help coordinate the events of labor to ensure that a child is delivered quickly.
Question 82
Short Answer
One hypothesis for why we age, or at least why our cells age, is that every time that mitosis occurs, ________ at the ends of chromosomes shorten, and eventually the cell runs out of these units at the ends of chromosomes.
Question 83
Essay
For fertilization to occur in humans, the sperm cells have a long journey to complete before reaching an egg. If a sperm reaches an egg, fertilization is still not complete. What events must happen for fertilization to be complete?