Which of the following is/are associated with "affective aggression"?
a. high sympathetic ANS activity
b. stimulation of the medial hypothalamus
c. attacks on other animals for food/kill
d. a and b
e. none of the above
Ans: d. a and b
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If all of the fungi on Earth ceased to exist, what would happen to the carbon cycle? Select all correct choices
A. As fungi are photosynthetic, less CO2 would be removed from the atmosphere. B. As fungi are decomposers, less CO2 would be released back into the atmosphere. C. As fungi are photosynthetic, more CO2 would be removed from the atmosphere. D. As fungi are decomposers, more CO2 would be released back into the atmosphere.
Which of the following results in a spontaneous mutation?
A. free radicals produced by cellular metabolism B. exposure to ultraviolet light C. exposure to benzo (a)-pyrene, a chemical substance found in cigarette smoke D. exposure to ultraviolet light and benzo (a)-pyrene E. exposure to X-rays
Fossil evidence indicates that ____ were common among ancient land plants
a. fungal infections b. endomycorrhizae c. lichens d. haustoria e. ectomycorrhizae
Which of the following statements about iPS cells is false?
(a) iPS cells are created by adding a combination of transcription regulators to a fibroblast. (b) iPS cells created from mouse cells can differentiate into almost any human cell type. (c) Stimulation by extracellular signal molecules causes iPS cells to differentiate. (d) During the de-differentiation process to become an iPS, the fibroblast will undergo changes to its gene expression profile.