An incomplete digestive system is seen in:
a. flatworms only
b. cnidarians only
c. both roundworms and annelids
d. both cnidarians and flatworms
e. mollusks
d
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Which of the following processes is associated with the outer mitochondrial membrane
A) phospholipid synthesis B) metabolite transport C) ?-oxidation of fats D) transcription E) ATP synthesis
What did the researchers conclude based on the data in figure (a)?
A. Endostatin shrunk tumors without development of resistance.
B. Endostatin shrunk tumors but resistance developed.
C. Cyclophosphamide delayed the growth of tumors without development of resistance.
D. Cyclophosphamide delayed the growth of tumors but resistance developed.
E. Tumors in untreated cells shrank in size.
Plant community structure along an environmental gradient can often be explained by
A) differences among species in their competitive abilities. B) differences among species in their abilities to tolerate stress. C) differences among species in their resistance to herbivores. D) a trade-off among species with respect to competitive ability and stress tolerance.
Which of the following is generally true of aneuploidies in newborns?
A) A monosomy is more frequent than a trisomy. B) Monosomy X is the only viable monosomy known to occur in humans. C) Human aneuploidy usually conveys an adaptive advantage in humans. D) An aneuploidy resulting in the deletion of a chromosome segment is less serious than a duplication.