Complement is a collection of
A) phagocytic cells that consume virus-infected body cells.
B) antibodies.
C) nonspecific antigens.
D) blood proteins that assist antibodies.
E) antibiotics.
D
Biology & Microbiology
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What factors determine the tree line in alpine areas? Check all that apply.
_____ low temperatures _____ water availability _____ pH of soil _____ high winds _____ light availability
Biology & Microbiology
Petruchio compares taming a shrew to
a. Training a dog b. Training a falcon c. Breaking a horse d. Singing a ballad
Biology & Microbiology
Dissolved oxygen content in stream water is affected by
a. organic matter in the water. b. overgrowth of algae. c. water nutrient levels. d. all of the above.
Biology & Microbiology
Where do plants get the carbon they use to make organic molecules?
a. glucose b. oxygen c. water d. starch e. carbon dioxide
Biology & Microbiology