Please match the clinical stage of infection with its description.
Appearance of first early, nonspecific symptoms
A) Prodromal stage
B) Period of invasion
C) Convalescent period
D) Incubation period
A) Prodromal stage
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The deep ocean biome is one that scientists know very little about. Primary producers in this biome cannot utilize sunlight as a source of energy
Which of the following statements provides a plausible description of the energy available to higher trophic levels from primary producers in this biome? A. There are probably only two trophic levels because there is only light available from bioluminescent organisms. B. The higher trophic levels (secondary or tertiary consumers) are probably only represented by one or two species because of the low levels of energy available from primary producers. C. The energy available from primary producers likely comes from the reduction of low-energy molecules (hydrogen sulfide or methane gasses). D. The biome is not stable because there is not a constant source of molecules available for primary producers to convert into biomass.
In plants, extreme wilting of leaves and stems can cause the cells to retract from the cell wall, a condition known as
____.
a. hemolysis b. an increase in turgor pressure c. plasmolysis d. a lack of solutes in the cell e. a higher than normal concentration of water in the cell
Disruptive selection favors
a. the intermediate forms. b. an extreme at one end of a range of variation. c. the extremes at both ends of a range of variation. d. a greater number of individuals in the center of the bell-shaped curve. e. neutral traits.
In allosteric enzyme regulation, which of the following is false about the molecules that can inhibit enzyme activity?
A) They can increase substrate binding. B) They can cause the active site to have a poor shape for binding substrate. C) They can bind to a site other than the active site. D) They cause a change in the enzyme's shape.