Bacteria isolated from a hot tub at 39 °C are probably which of the following?
A. thermophiles
B. psychrotrophs
C. mesophiles
D. hyperthermophiles
Answer: C. mesophiles
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The name of the meristem that ultimately gives rise to secondary xylem and phloem is the
A. vascular cambium. B. cork cambium. C. intercalary meristems. D. ground meristem. E. primary meristem.
The letter “C” above represents
a. uterus. b. ovary. c. vagina. d. urinary bladder. e. pelvic girdle.
Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of _____
A) phosphorylated proteins B) cAMP C) adenylyl cyclase D) activated G proteins
Select all of the following that are true of the intrinsic rate of population growth.
A. It is not often seen in nature. B. It is the rate of population growth once a population reaches its carrying capacity. C. It is the rate of population growth under optimal conditions. D. It is seen when populations are in equilibrium. E. It is most commonly seen in new, expanding populations.