African-American men are more likely to develop prostate cancer and die from it than Caucasian or Asian men.
a. true
b. false
Answer: a. true
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What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane?
A) In simple diffusion, molecules move down the concentration gradient but in facilitated diffusion molecules move up the concentration gradient. B) In facilitated diffusion, molecules only move with the aid of a protein in the membrane. C) Simple diffusion requires molecules to move through special doorways in the cell membrane. D) Simple diffusion is passive but facilitated diffusion is an active process that uses energy.
Which of the following is/are vector quantity(s)?
A. angular velocity B. angular acceleration C. both A and B D. neither A nor B
Adults normally develop 32 teeth.?
Indicate whether the statement is true or false
Calcitriol stimulates absorption of calcium in the small intestine.
Answer the following statement true (T) or false (F)