Which organism would be found at the top of a lake biomass pyramid?
a. algae
b. rooted plants
c. invertebrates
d. small fish
e. large-mouth bass
ANSWER: e
Biology & Microbiology
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Blood pressure is highest in the:
a. arteries b. arterioles c. capillary bed d. venules e. veins
Biology & Microbiology
Immunological memory results from the production of
A. memory B cells and memory cytotoxic T cells. B. mast cells and memory B cells. C. memory mast cells. D. memory B cells. E. memory cytotoxic T cells.
Biology & Microbiology
At rest, the partial pressure of oxygen (PO2) is most veins is approx. 40 mm Hg. At this PO2, approx. ______ of hemoglobin molecules are associated with oxygen.
A. 25% B. 40% C. 50% D. 75%
Biology & Microbiology
Chemical messengers produced in one part of the body that control the activity of other parts are called _________
Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology