Ethnic differences in skin color are primarily caused by differences in ________
A) the quantity of melanin produced
B) UV radiation exposure
C) the number of melanocytes
D) the quantity of hemoglobin carried in the blood
E) the number of keratinocytes
A
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A nervous system pathway consists of two components. What are they?
A. A tract and a ganglion B. A nucleus and a ganglion C. An axon and a nucleus D. A tract and a nucleus E. An axon and a ganglion
The dip of the meningeal layer of the dura mater into the transverse fissure is the _________________________.
Fill in the blank(s) with the appropriate word(s).
An active process for transporting liquid across a plasmalemma is
A) exchange pumps. B) bulk flow. C) phagocytosis. D) pinocytosis. E) None of the answers are correct.
The acrosome helps a sperm penetrate the follicle cells that surround the egg
Indicate whether the statement is true or false