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Chapter Assessment Lesson 15.4
Learning Key Terms and Concepts
True or False?
A gamete has 46 chromosomes.
A. True
B. False
True or False?
After intercourse, a few thousand sperm may reach the oocyte.
A. True
B. False
What is the function of acrosomal enzymes in sperm?
Describe how pregnancy-test kits work.
Where is the placenta located and what is its function?
Which structure connects the fetus to the placenta?
Which stage of labor lasts the longest, and what events occur during this stage?
Which hormone stimulates the secretory cells of the mammary glands to produce milk?
Thinking Critically
Explain why it is important for pregnant women to avoid drinking alcohol and taking drugs that are illegal or not prescribed. How can these substances reach the developing fetus?
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