Plz me solve this anyways thxs and have a good day

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

According to the cladogram, which organisms have roundworms as a common ancestor?

What is the most appropriate method of gaining weight (muscle mass)