Which of the following is mismatched?
a. acetylcholine; muscle contraction
b. endorphin; pain perception
c. norepinephrine; fight-or-flight response
d. serotonin; sexual function
e. GABA; major inhibitor in the brain
ANSWER: d
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An individual who is at risk of passing a genetic defect onto his or her offspring would most likely undergo ____
a. genetic testing b. genetic screening c. enzyme replacement therapy d. preimplantation genetic diagnosis (PGD) e. amniocentesis
Which step is NOT involved in the fertilization of angiosperm flowers?
A. Pollen is transported to a stigma of a flower. B. When pollen reaches the stigma of a flower, it begins to grow a pollen tube that pierces the style. C. The style of the pistil contracts to bring the sperm closer to the embryo sac. D. The pollen tube grows until it reaches the ovule in the ovary. E. Double fertilization produces an embryo and the endosperm.
A haploid cell is a cell
a. in which the genes are arranged haphazardly. b. containing only one copy of each chromosome. c. that has resulted from the process of mitosis. d. with twice the number of chromosomes of a diploid cell. e. None of the above
Which method of DNA repair uses light to repair thymine dimers that have been causes by UV light exposure
What will be an ideal response?