Which one of the following occurs in sea urchin but not mammalian fertilization?
A) the binding of a sperm cell to the egg
B) a fast block to polyspermy
C) hydrolytic enzymes are spilled from the acrosome
D) a slow block to polyspermy
E) a fusion of the egg and sperm membranes
Answer: B) a fast block to polyspermy
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system cancers in males? a. Prostate cancer is a leading cause of death in men. b. There are 7,000 cases of testicular cancer diagnosed each year in the Unites States. c. Some individuals who have prostate cancer are unaware of their condition. d. Prostate cancer and testicular cancer produce painful symptoms in their early stages. e. Early treatment of testicular cancer has a high success rate.
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A prophage is an early stage in the
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