Nitrogenous bases form pairs in specific combinations. Identify these pairs in the spaces below. a) always pairs with b) always pairs with

Adenine always pairs with Thymine

Guanine always pairs with Cystosine

Explanation:

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the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.