Implantation begins how many days after fertilization in humans?
a. 1 day
b. 7 days
c. 14 days
d. 21 days
e. 28 days
ANSWER: b
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A chimpanzee's closest extant relative is a(n)
A. orangutan. B. mandrill. C. South American spider monkey. D. human.
The difference between microevolution and macroevolution is that
A) microevolution affects bacteria and macroevolution affects larger organisms. B) microevolution happens slowly and macroevolution happens quickly. C) macroevolution happens slowly and microevolution happens quickly. D) microevolutionary changes are small, and macroevolutionary changes are large.
Dissolved sugars are transported in:
a. cork cambium.
b. epidermis. c. pith. d. phloem. e. xylem
Predict what would happen to the volume of the urine if the descending portion of the loop of Henle ceased to function.
A. The volume of the urine would increase. B. The salt concentration of the urine would remain constant. C. The volume of the urine would not change. D. The volume of the urine would decrease.