Why doesn't a tapeworm have a mouth on its scolex?
A. The mouth is located at the end of the pharynx.
B. Tapeworms use a radula instead of a mouth to feed.
C. Endoparasites don't need a mouth.
D. The mouth is on the proglottids.
Answer: C
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Considering the catabolite repression mechanism, which observation would make you suspect it is NOT occurring?
A) CRP bound to promoter sites B) elevated levels of transcripts for maltose and sucrose catabolism C) relatively low intracellular cyclic AMP levels D) RNA polymerase bound to biosynthetic promoter sequences
Turgor is most directly related to the plant cells'
A. total water potential. B. solute potential. C. osmosis. D. gravity potential. E. pressure potential.
Which group would be an ecological population of organisms?
A) all chipmunks in a wood lot B) all plants in a garden C) all animals in a zoo D) all plants and animals in a rainforest
Which of the following is a condition caused by a sex-linked inheritance in which a male child will bleed extensively because he lacks the physiological properties to form a blood clot?
A) male-pattern baldness B) hemophilia C) sickle-cell disease D) color blindness