Some liver cells ingest bacteria, a function probably accomplished by _____.
A. pinocytosis
B. phagocytosis
C. receptor-mediated endocytosis
D. exocytosis
E. passive transport
Answer: B. phagocytosis
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T cells and B cells are produced in the
A. bone marrow. B. thymus. C. Peyer's patches. D. nervous tissue.
You are planning a careful study of the metabolic rate of a spotted bat (Euderma maculatum). At the last minute, you learn that you will not be able to measure caloric intake directly. Should you abandon your study?
A. Yes, because caloric measurement would provide the only meaningful data. B. No, because water intake can provide an indirect measurement of metabolic rate. C. No, because oxygen intake can be measured instead, and it will provide an indirect measurement of metabolic rate. D. No, because carbon dioxide intake can be measured instead, and it will provide an indirect measurement of metabolic rate. E. No, because digestive enzyme production can be measured instead, and it will provide an indirect measurement of metabolic rate.
How long are active vents thought to last?
a. 30 years b. 25 years c. 20 years d. 15 years
In Drosophila, sex determination is carried out by
A) a cascade of alternative splicing. B) the SRY gene. C) histone modification. D) the DMRT1 gene. E) All of these