Which regulatory protein is mismatched with its function?
a. Type I interferons?inhibit viral replication
b. interleukin-1?resets body's thermostat, resulting in fever
c. tumor necrosis factor?kills tumor cells
d. cytokines?secrete antibodies
e. Type II interferons?stimulate macrophages to destroy tumor cells
D
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Cladistic analysis of populations of blue wildebeest in Africa has helped to show that habitat fragmentation has led to
a loss of ____. a. evolution b. alleles c. genes d. gene flow e. mutations
Compare the activation and functions of T and B cells. What will be an ideal response?
What happens to the oxygen that is used in cellular respiration?
A. It is converted to carbon dioxide. B. It is used to make Krebs cycle intermediates. C. It is used to make glucose. D. It is reduced to form water. E. It is converted to acetyl-CoA.
What do the alveoli of mammalian lungs, the gill filaments of fish, and the tracheoles of insects all have in common?
a. They use a circulatory system to transport absorbed O2. b. Their respiratory surfaces are invaginated. c. They function using countercurrent exchange. d. They have a large, thin surface area for gas exchange. e. All of the listed responses are correct.