Which of the following immune system components has been identified in almost all multicellular

organisms?
a. bone marrow
b. phagocytes
c. antimicrobial peptides
d. T-cells
e. memory cells


C

Biology & Microbiology

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Phototropism is a plant response controlled largely by which color of light?

A. Red. B. Blue. C. Violet. D. Green. E. None of the choices is correct.

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There is a __________ flow of energy into and out of

an ecosystem, and a cycling of materials among resident species. Fill in the blank(s) with the appropriate word(s).

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A disease that occurs more or less all the time is classified as ____

a. epidemic b. pandemic c. endemic d. nosocomial e. maldemic

Biology & Microbiology

MacConkey Agar selects for growth of which type of organism?

A) Gram-positive B) Gram-negative

Biology & Microbiology