Specialized clusters of cells that secrete hormones are found scattered throughout the ____
a. adrenal cortex
b. liver
c. thymus
d. adrenal medulla
e. pancreas
ANSWER: e
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Plasmids can carry genes that are useful to the host bacteria. These genes encode proteins that can extend the range of environments that can be exploited by the bacteria. Which of the following would be a benefit to the host bacteria?
A. a plasmid that confers sensitivity to antibiotics B. a plasmid that protects the bacteria from the host animal's immune response C. a plasmid that encodes an agent that facilitates tissue colonization D. a plasmid that confers antibiotic sensitivity and protects against a host's immune response E. a plasmid that protects against a host's immune response and facilitates tissue colonization
Which of the following is NOT a protein involved in DNA replication?
A. replication fork. B. single-stranded binding proteins. C. DNA ligase. D. topoisomerase. E. helicase.
Which turtle has a diet of seagrass?
a. Kemp's ridley b. Leatherback c. Hawksbill d. Green sea turtle e. Loggerhead
Which of the following layers lies next to the lumen
of the intestinal tract? a. longitudinal muscles b. circular muscles c. submucosa d. mucosa e. serosa