Changing a river into a lake is basically what a large dam does. one reason we do this to create reservoirs of fresh water. what is another positive reason to build a dam? a) dams can control flooding. b) dams are needed by certain types of fish. c) dams drastically change the local ecosystem. d) dams can reduce the intense heat of summer.

In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

Which process of living things produces water that enters the water cycle