Cortisol is a steroid hormone that induces physiological changes including _______.
a. Activation of immune system
b. Elevation of glucose level in blood
c. Activation of bone formation
d. All of the above
e. b and c
Answer: b. Elevation of glucose level in blood
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You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal also has _____
A) simple, but not compound, eyes B) two pairs of antennae C) a head, thorax, and abdomen D) tracheae and spiracles
Allan Wilson showed that the mtDNA of Africans is more diverse than that of other human populations. Does this finding provide evidence for the multiregional (MRE) model or the recent African origin (RAO) model?
What will be an ideal response?
_____________ is an action or signal on the part of one organism that alters the behavior of another organism.
a. Language b. Courtship c. Visualization d. Deception e. Communication
Microorganisms that live in severe habitats, such as very hot, acidic or salty environments, are called
A. thermophiles. B. barophiles. C. extremophiles. D. halophiles. E. psychrophiles.