Which animal has radial symmetry, a gastrovascular cavity, and the same opening for the entry of food and expulsion of waste?
a. a cnidarian
b. a flatworm
c. an annelid
d. a mollusk
e. a sponge
ANSWER: a
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Which cells does IgE bind to in an allergic reaction?
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All of the following can increase the genetic diversity of a population except
A. migration of individuals into a population from another population. B. sexual reproduction. C. asexual reproduction. D. mutation.
Water potential is generally most negative in which of the following parts of a plant?
A) mesophyll cells of the leaf B) xylem vessels in leaves C) xylem vessels in roots D) cells of the root cortex
You would know a dividing cell was a plant cell rather than an animal cell if you saw that ________________.
Fill in the blank(s) with the appropriate word(s).