Many of the different types of GPCRs in humans function to ____
a. distinguish different volatile molecules for odor recognition
b. regulate metabolism by sensing and responding to changes in glucose levels
c. regulate liver function by responding to different macromolecules
d. aid in memory by binding to neurotransmitters in the amygdala
e. trigger the fight of flight response by binding to hormones in the hypothalamus
ANSWER: a
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Why do moderate levels of disturbance result in an increase in community diversity?
A) Habitats are opened up for less competitive species. B) Competitively dominant species infrequently exclude less competitive species after a moderate disturbance. C) The environmental conditions become optimal. D) The resulting uniform habitat supports stability, which in turn supports diversity. E) Less-competitive species evolve strategies to compete with dominant species.
Stable annealing due to hydrogen bonding between DNAs of similar nucleotide sequence from different organisms is referred to as ________.
A. hybridization B. restriction C. ligation D. hydrolysis
Parkinson's disease involves low levels of _____
a. acetylcholine (ACh) c. serotonin b. dopamine d. endorphins
The reduced reproductive rate in primate evolution involves
A. lengthy gestation periods with one birth at a time. B. extended life spans. C. a reduction in the number of offspring. D. All of the choices are correct.