Hookworms, pinworms, and guinea worms are
a. roundworms.
b. flatworms.
c. annelids.
d. circular worms.
e. flukes.
Answer: a
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Which of the following is not a tenet of the cell theory?
A) All organisms consist of one or more cells. B) All cells arise from preexisting cells. C) The cell is the basic unit of structure for all organisms. D) All cells have a membrane-bound nucleus. E) none of the above
High-intensity training in racehorses results in
a. muscle atrophy. d. no change in the expression of genes, but changes in phenotypes. b. the expression of genes in metabolism, oxidative phosphorylation, and muscle structure. e. changes in the expression of genes, but no changes in phenotypes. c. no phenotypic or biochemical changes
A taste bud is indicated by
a. A. b. B. c. C. d. A and B. e. none of these; they are olfactory receptors.
Which organism would be found at the top of a lake biomass pyramid?
a. algae b. rooted plants c. invertebrates d. small fish e. large-mouth bass