Insulin promotes the storage of glucose by:
a. stimulating protein synthesis.
b. increasing the use of fatty acids as fuel.
c. promoting the liver to release glucose.
d. stimulating fatty acid release by adipose tissue.
e. inhibiting glycogen formation.
a
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If mitosis makes somatic cells, what does meiosis make?
A. Gametes B. Heart cells C. Body cells D. Nerve cells
Why is it that the tongue and cheek epithelium doesn't provide a sufficient anaerobic environment for plaque anaerobes to grow, but the surface of teeth might?
A. The epithelium is supplied with oxygen by capillary beds. This makes it a relatively aerobic environment and hostile to anaerobes. B. The tooth enamel is supplied with oxygen by capillary beds. This makes it a relatively anaerobic environment and hostile to aerobes. C. The surface of the tongue and cheek are constantly scraped by the action of consuming food. Layers of bacterial growth that might help to supply an anaerobic environment are scraped away, exposing lower levels to oxygen-rich air. D. The surface of teeth (especially the molars) have many pits and crevices that can serve as 'pockets' for layers of bacteria to grow in. Once the layers get deep enough, the bottom portions are anaerobic. This isn't possible on the very smooth surface of the tongue and cheek epithelium.
The actual niche the organism is able to occupy in the presence of competitors is called its
A. fundamental niche. B. realized niche. C. interference niche. D. intraspecific niche. E. exploitative niche.
A difficult task for the biologist trying to determine if a group of organisms is a separate species is __________.
a. to compare appearances of different organisms b. to determine if a hybrid offspring is produced c. exposing isolating mechanisms d. determining whether group members breed with organisms outside the group e. comparing DNA from those