Anyone know the anwser? what is the cause of lightning? a. airflow between a cloud and the ground b. varying air pressure underneath a cloud c. different charges on the ground and the bottom of a cloud d. the different elevations of a cloud and the ground

Which is it a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

Which flexible structure that supports the nerve cord and led to the backbone

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?