An of genes that make proteins that regulate the cell cycle.

Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). ... Cdks are kinases, enzymes that phosphorylate (attach phosphate groups to) specific target proteins.

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.