Which of those listed below is NOT classified as a cardinal temperature?
a. lethal temperature
b. maximum temperature
c. minimum temperature
d. optimum temperature
Answer: A
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Blood cell formation takes place in:
A. compact bone. B. spongy bone. C. bone marrow. D. trabeculae.
G protein-adenyl cyclase activity has been shown, in some cases, to be associated with certain diseases. In the case of cholera, which of the following is not correct?
A) Vibrio cholera bacteria colonize the gut. B) Cholera toxin is secreted by Vibrio cholera bacteria. C) The cholera toxin causes the cells of the gut to take in salts and fluids. D) Cholera toxin alters Gs so that it no longer hydrolyzes GTP. E) The toxin, by altering Gs, keeps intracellular cAMP levels high and doesn't allow them to decrease.
Refer to the accompanying figure. The peak in ____ around day 21 corresponds with ____
a. luteinizing hormone; ovulation
b. follicle-stimulating hormone; the development of the follicle
c. estrogen; breakdown of the endometrium
d. progesterone; continuing to build up the endometrium
e. estrogen; ovulation
The xylem and phloem are produced by the
A. vascular cambium. B. sieve tube. C. vascular bundle. D. mycorrhizal fungi. E. companion cells.