Which is an example of nonrandom mating?
a. Selecting a mate by their genotype
b. Selecting a mate by their phenotype
c. Selecting a mate by their species richness
d. Selecting a mate by their family relationship
e. Selecting a mate by their success of defeating another
b
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Explain how Vibrio cholerae causes cholera without apparent damage to the intestinal epithelium
A. This microbe causes destruction of the cellular structures underneath the intestinal epithelium-this is what induces the watery rice-stool characteristic of the illness. This leaves the overlying intestinal epithelium intact. B. This microbe directly invades the intestinal epithelial cells, but does not kill them. Instead, while multiplying inside them, it causes them to secrete large amounts of chloride ions. This induces water to follow by osmosis, resulting in the watery rice-stool characteristic of the illness. C. This microbe attaches to the surface of intestinal epithelial cells, secreting an exotoxin that causes the epithelium to secrete large amounts of chloride ions. This induces large amounts of water to follow by osmosis, resulting in the watery rice-stool characteristic of the illness. D. The inflammatory reaction to the presence of this microbe causes the watery rice-stool characteristic of the illness. Therefore, it's technically the immune response that initiates the disease, although this response is induced by the presence of the microbe on the intestinal epithelium.
________ are various types of intracellular structures thought to have evolved within a cell rather than as organelles
a. Endosymbionts b. Ribosomes c. Lysosomes d. Mitochondria
In lakes and ponds, the ________ zone is a shallow-water zone along the perimeter in which light reaches the bottom
Fill in the blank(s) with correct word
Photorespiration is a condition that occurs in hot and dry climate where plants use O2 instead of CO2 in the Calvin-Benson Cycle
A. True B. False