How could a biologist distinguish an acoel flatworm from a free living platyhelminth?
A. The acoel worm would have a nervous system.
B. The acoel worm would be solid throughout, since it lacks a gut.
C. Only the acoel is triploblastic.
D. The platyhelminth would have a more primitive gut and nervous system.
Answer: B
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Which of the following statements about the angiosperm embryo sac is FALSE?
A. It contains eight nuclei. B. It is the gametophyte generation of the plant. C. The nuclei within the embryo sac are diploid. D. The synergids flank the egg cell. E. The embryo sac nuclei are the product of mitotic division of a megaspore.
Human insulin, which does not provoke allergic reac-tions, has been produced by transgenic E. coli since ____
a. 1952 b. 1962 c. 1972 d. 1982 e. 1992
The environment of an organism would include its
A. enemies. B. food. C. diseases. D. All of these answers are true.
One of the Hardy-Weinberg assumptions states that the population is infinitely large. What influence might a small population size have on a Hardy-Weinberg equilibrium?
What will be an ideal response?