Which human activity has the most negative effect on the stability of a river environment? A. People picnicking along the bank of the river B. Sailboats being stored in the river C. Driving a car near the river D. Boats leaking oil into the river

When organisms convert from of energy, what usually results

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?