Plasma normally amounts to what percent of the total
blood volume?
a. 15 to 25
b. 33 to 40
c. 50 to 60
d. 66 to 75
e. about 80
Answer: c
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Which of the following is/are able to survive phagocytosis?
A. Brucella sp. B. Staphylococcus aureus C. Francisella tularensis D. Brucella sp AND Francisella tularensis
The representation H?O?H is known as:
a. a structural formula. b. a simplest formula. c. a molecular formula. d. a Lewis structure. e. an orbital diagram.
Manta rays, sting rays, and eagle rays are similar to lampreys in that they have cartilaginous skeletons. How are they different from lampreys?
A. They have gills. B. They have closed circulatory systems. C. They have bony fin lobes. D. They have jaws.
Some clones of the original immune cells are __________ cells, long-lived B and T cells reserved for
future encounters with the antigen. Fill in the blank(s) with the appropriate word(s).