The __________ have an unsegmented body, a cuticle that is molted, a complete gut, and a pseudocoelom. Fill in the blank(s) with the appropriate word(s)
ANSWER: roundworms, nematodes
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Koopman’s research on mouse meiosis showed that
a. there is a meiosis promoting gene. b. a meiosis inhibiting gene leads to retinoic acid production. c. retinoic acid prevents meiosis. d. the Cyp26b1 gene is expressed in testes but not ovaries. e. there is no effect if male mice do not have a Cyp25b1 gene.
During mitotic cleavage
a. no cell division occurs and the mass does not increase. b. no cell division occurs and the mass does increase. c. cell division occurs and the mass does not increase. d. cell division occurs and the mass does increase. e. the cell is in a dormant stage.
The administration of the drug diclofenac to livestock inadvertently poisoned ____ and led to an
increase in the disease ____.
a. cattle; hoof and mouth b. vultures; rabies c. children; epilepsy d. coyotes; hemolytic E. coli e. cattle egrets; avian flu
An defect in the thyroid hormone from birth results in ________.
Fill in the blank(s) with the appropriate word(s).