Step two: Think about your answer
before looking at the possible choices.
Answer the question in your
head, pretending it’s an essay or short-answer
question. The important ideas here are that surface
area is determined by the square of the radius, and
volume by the cube. Surface areas, volumes, and
surface area–to-volume ratios for the two cells
will thus be different.
[Cell A] is
a roughly [spherical] animal cell
with a [radius of 10 microns]. [Cell
B] is also roughly [spherical]
and has a [radius of 20 microns].
Which of the following statements about these two
cells is [false]?
- Cell A has a smaller volume
than cell B.
- Cell B has a larger surface
area than cell A.
- Cell A has a larger surface
area–to-volume ratio than does cell B.
- Cell B has a larger surface
area–to-volume ratio than does cell A.
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Please direct all comments and/or
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