Which gas is considered a greenhouse gas?

A) water vapor
B) carbon monoxide
C) gaseous nitrogen
D) nitrous oxide


A

Biology & Microbiology

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Indicate whether this statement is TRUE or FALSE.

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The two major categories of extracellular signal molecules that bind to cell surface receptors are ____

a. peptide hormones and steroid hormones b. steroid hormones and neurotransmitters c. neurotransmitters and vitamins d. growth hormones and vitamins e. peptide hormones and neurotransmitters

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P700 is located in photosystem ____ and is comprised of chlorophyll ____ absorbing light with a

wavelength of 700 nm.

a. I; b b. I; a c. II; b d. II; a e. I and II; a

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The substance that an enzyme combines with is

a. another enzyme. b. a product. c. an active site. d. the substrate.

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