People planted huge numbers of trees and other plans how might the carbon dioxide levels in the graph above change

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

Which are reasons cells undergo cell division?

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the