Which hormone sets the body's basal metabolic rate?
A. estrogen
B. insulin
C. norepinephrine
D. cortisol
E. thyroxin
E. thyroxin
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In the early 1900s, many people, particularly in the southern U.S., suffered from infections
with parasitic hookworms. Many of these hookworms feed on blood cells of the host and thus also consume iron that is found in red blood cells. A symptom of a heavy infection is a craving to eat dirt—particularly clay-like soils with a high iron content. Thus, for these people, iron is a __________.
a. tradeoff b. constraint c. part of the organism’s niche d. nonlimiting resource
What percent of plants are polyploids?
a. 20 b. 35 c. 50 d. 70 e. 90
___________ or imitation is a form of associative learning that involves a complex set of associations involved in watching another animal being rewarded for performing a particular behavior and then performing that same behavior oneself.
A. Observational learning B. Conditioned reflex learning C. Imprinting D. Insight
A woman who was selected to have her entire genome sequenced would discover that she had at least ___ homolog(s) for every chromosomal gene.
a) 2 b) 1 c) 4 d) 0 e) 3