How does angiotensin increase blood pressure?
a. It induces vasodilation.
b. It causes stress which results in high blood pressure.
c. It induces vasoconstriction.
d. It triggers the kidneys to increase blood volume.
c. It induces vasoconstriction.
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When reporting a direct smear from a primary specimen, it is important to note all of the following except:
a. white blood cells. b. squamous epithelial cells. c. artifacts. d. prominent cell shapes and arrangements.
The nucleus of a eukaryotic cell is separated from the cytoplasm by the
1.plasma membrane. 2.cell wall. 3.endoplasmic reticulum. 4.ribosomes. 5.nuclear envelope.
Type II survivorship curves
a. are characteristic of humans and elephants. b. indicate a fairly constant rate of death at all ages. c. indicate a high mortality rate in the very young. d. are characteristic of species in which most individuals live a relatively long life and die of old age. e. are typical of species with high biotic potentials.
Imagine that a new population of humans is established on a new planet from ten randomly selected people in your biology class. Over thousands of years, the descendants of those ten people reproduce and prosper, but do not reflect well the diversity of humans of Earth. This change in the diversity of people on the new planet is an example of _____________.
A. gene flow B. genetic drift C. the bottleneck effect D. the founder effect