What causes convection currents to occur on earth? A. Cool air rising, warm air sinking

B. Cool air rising, but warm air rising

C. Warm air rising, cool air sinking

D. Warm air sinking, cool air sinking

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.