Prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida.
Answer the following statement true (T) or false (F)
True
It is true that prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida.
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Mitochondria and chloroplasts are thought to have once been free-living bacteria that invaded another cell
Indicate whether this statement is true or false.
The primary function of plasma cells is to
A) secrete antibodies. B) remember immune responses. C) secrete cytokines. D) protect phagocytes.
Touching your chin to your chest is an example of ____________________. Fill in the blank(s) with the appropriate word(s)
Which of the following is NOT a trait that is the result of, or is affected by, the interaction of more than one gene?
A. human skin color B. sickle-cell anemia C. cleft palate D. height