T cell receptors recognize ______, distinguishing cells that belong to the body from infected body cells.

A. antigens
B. MHC markers
C. antigens and MHC markers
D. complement
E. cytokines and complement


Answer: C

Biology & Microbiology

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Something with a pH of 5 would be ________.

A. basic B. neutral C. alkaline D. acidic

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A clinical specimen represents a portion or quantity of human material for testing, examination, or study in order to determine the presence or absence of specific microorganisms.

Answer the following statement true (T) or false (F)

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Dwarf pea plants have deficient levels of the hormone gibberellin

Indicate whether the statement is true or false.

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Based on the phylogeny shown, which species is not a tree but has seeds?

A. Pine B. Rose C. Psaronius D. Oak E. Fern F. Ginkgo

Biology & Microbiology