Autonomic nervous system pathways contain ____
a. three neurons
b. two neurons
c. one neuron
d. four neurons
e. no neurons
ANSWER: b
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In relation to malaria and P. falciparum, the human liver and circulatory system (especially red blood cells) are both locations that:
A. have immune system cells that express the PfEMP1 T cell receptors. B. contain P. falciparum during some stage of its life cycle. C. have immune system cells that can effectively keep up with P. falciparum's antigenic variation. D. demonstrate granulomas in response to P. falciparum infection.
Photoheterotrophs are best described as organisms that obtain energy to make ATP
A) from organic compounds but use sunlight to produce carbon sources. B) and organic compounds from sunlight. C) from sunlight but cannot make organic compounds from CO2. D) from some forms of chemicals. E) from organic compounds.
Ribose differs from deoxyribose by having:a
two attached bases. b. one less oxygen. c. an extra hydroxyl group. d. an extra carbon in the ring. e. one less carbon in the ring.
In humans, which genetic mechanism led to the formation of the X and Y chromosomes?
A. Translocation B. Nondisjunction C. Inversion D. Reduced crossing over E. Insertion