In a Pacific kelp forest, which is a keystone species?
a. Giant kelp
b. Sea otters
c. Humans
d. Sea urchins
b
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Which of the boxes marked 1-4 correspond to plants with a heterozygous genotype?
A) 1 B) 1 and 2 C) 1, 2, and 3 D) 2 and 3 E) 2, 3, and 4
Which enzyme in the glycolytic pathway acts as a switch that can be regulated by ATP, AMP, and citrate?
a. pyruvate kinase b. triosephosphate isomerase c. aldolase d. ATP synthase e. phosphofructokinase
Acetylcholine ____ skeletal muscle and ____ cardiac muscle
a. stimulates; also stimulates b. stimulates; inhibits c. inhibits; stimulates d. inhibits; also inhibits e. binds receptors on; does not bind receptors on
Polyomaviruses
A. cause common asymptomatic to mild infections. B. include the JC virus and BK virus. C. cause progressive multifocal leukoencephalopathy. D. cause problems in renal transplant patients. E. All of the choices are correct.