The nematode Caenorhabditis elegans is important to human medicine because it
A. causes elephantiasis, a disease of the lymph glands that causes the legs of humans to swell.
B. is transmitted by mosquitoes and causes high fevers.
C. is an intestinal parasite in human digestive tracts.
D. has easily observed development and has a short generation time.
Answer: D
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Strobili are
a. gametangia. b. cone-shaped spore sacs. c. homospores. d. underground stems. e. horizontal stems.
An ionic bond forms when
A. an electrical attraction occurs between two atoms of different charge. B. a nonpolar attraction is formed between two atoms. C. a valence electron is shared between two atoms. D. two atoms have similar attraction for electrons.
Malignant plasma cells exhibiting CD38, CD56, and CD138 are found in:
A. Waldenstrom macroglobulinemia. B. chronic myeloid leukemia. C. multiple myeloma. D. monoclonal gammopathy of undetermined significance
Polyploidy is an important mechanism of speciation in plants
Indicate whether the statement is true or false