Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda are all lineages within the phylum
a. Rotifera.
b. Mollusca.
c. Platyhelminthes.
d. Annelida.
e. Nemertea.
B
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Recall from the text the example of cell communication in Streptococcus pneumoniae: the rate of DNA uptake by pneumococcal cells increases sharply when they are at high density due to changes in gene expression brought about by signaling between cells
If the pneumococcal cells did not express receptor protein, how would the rate of DNA uptake be affected when the cells reach high density? A. There would be no change in the rate of DNA uptake. B. There would be a larger than normal increase in the rate of DNA uptake. C. There would be a smaller than normal increase in the rate of DNA uptake. D. There would be a decrease in the rate of DNA uptake.
The female gonads are the
A) ovaries. B) oocytes. C) uterus. D) labia.
Part of a DNA template of sequence GTTAGTCTGTGGGCT corresponds to the amino acid sequence
A) GTTAGTCTGTGGGCT. B) CAAUCAGACACCCGA. C) gln-ser-asp-thr-arg. D) val-ser-leu-trp-ala.
As adults, ____ are the only sessile crustaceans whose external anatomy is completely different than its fellow
crustaceans. a. ticks b. shrimp c. decapods d. uniramids e. barnacles