Which organ system(s) play role(s) in eliminating metabolic wastes from the body?
a. excretory system only
b. respiratory system only
c. nervous system only
d. excretory and respiratory system
e. excretory, respiratory, and circulatory system
ANSWER: e
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In the experiments constructed by Pasteur to disprove spontaneous generation, swan-necked flasks were used. Why was this shape of flask used in this experiment?
A. The shape of the glass neck allowed the bacteria into the flask and then into the media, but air could not enter. B. Because the glass necks were stretched out, the heat used to sterilize the medium inside of the flask could not kill the bacteria in the neck. C. The glass necks needed to be open to the air, yet constructed so that bacteria would settle in the lowest part of the neck. D. These flask shapes were the easiest and cheapest to produce.
Which cell structure is most likely responsible for sensing gravity?
A. Golgi apparatus B. apical meristem C. amyloplast D. central vacuole E. chloroplast
The process that releases digestive enzymes is
a. absorption. b. assimilation. c. secretion. d. digestion. e. elimination.
_______is usually detrimental in eukaryotic species because, for some genes, the over- or under-expression of these genes may interfere with the proper functioning of cells.
Fill in the blank(s) with the appropriate word(s).