5 Steps to a 5 AP Biology, 2014-2015 Edition

AP Biology Practice Exam 1 ❮ 271

For questions 55–56, please refer to the following
diagram:

55.The bold line that point Cintersects is known as
the
A. biotic potential.
B. carrying capacity.
C. limiting factor.
D. maximum attainable population.

56.On the basis of what happens at the end of this

chart, what is the most likely explanation for the

population decline after point E?

A. The population became too dense and it had

to decline.

B. There was a major environmental shift that

made survival impossible for many.

C. Food became scarce, leading to a major

famine.

D. The population had become too large.

F D

C E

Population of

wild turkeys

A B

Time

Questions 57 and 58
The solutions in the two arms of this U-tube are sep-
arated by a membrane that is permeable to water and
sodium chloride, but not to sucrose. Side A is filled
with a solution of 0.6 M sucrose and 0.2 M sodium
chloride (NaCl), and side B is filled with a solution of
0.2 M sucrose and 0.3 M NaCl. Initially, the volume
on both sides is the same.

57.At the beginning of the experiment,

A. Side A is hypertonic to side B.

B. Side A is hypotonic to side B.

C. Side A is isotonic to side B.

D. Side A is hypotonic to side B with respect to

sucrose.

Side A Side B

0.2 M Sucrose

0.3 M NaCl

0.6 M Sucrose

0.2 M NaCl

Membrane

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