In a plant, __________ represent a source and __________ represent a sink
a. leaves; fruits
b. fruits; leaves
c. roots; leaves
d. roots; fruits
A
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By the time of birth, the human body contains
approximately
a. a thousand cells. b. a million cells. c. a billion cells. d. a trillion cells. e. a quadrillion cells
The mechanism of evolution proposed by Charles Darwin in The Origin of Species is
A) acclimatization. B) natural selection. C) acquired inheritance. D) adaptation.
In the male, an enlarged ________ gland may squeeze the urethra, causing urinary retention
Fill in the blank(s) with correct word
What happens to your blood pressure when you run?
a. Only your diastolic blood pressure elevates. b. Both your diastolic and systolic blood pressures elevate. c. Both your diastolic and systolic blood pressure stay the same. d. Only your systolic blood pressure elevates.