Photosynthesis is the main source of energy for these eukaryotes. This multicellular organism has cell walls
around all of its cells. .

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?

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Are the earth's ocean floor and continents the same age geologically? why or why not?