In which season does lake stratification occur?
A) summer
B) spring
C) fall
D) winter
A
Biology & Microbiology
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Chlamydia occurs in two forms, a reticulate body and an elementary body
Indicate whether this statement is true or false.
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The platelet-derived growth factor stimulates the growth of what type of cell?
a. stem cells b. blood cells c. endothelial cells d. brain cells
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Hydrogen ions cross the thylakoid membranes from the stroma by
A) simple diffusion. B) osmosis. C) facilitated diffusion. D) synthesis. E) active transport.
Biology & Microbiology
The least common type of polio is
A) nonparalytic polio. B) an asymptomatic infection. C) minor polio. D) paralytic polio. E) postpolio syndrome.
Biology & Microbiology