What best summarizes the cell theory

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

Ture or false evidence for evolution includes millions of fossils

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?