Which methods can help prevent wind erosion? Select three answer choices. -rotating crops
-mulching soil
-installing windbreaks
-removing vegetation
-avoiding soil compaction

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Donde se encuentra el adn nuclear en un organismo eucariota?