How long is a human being one cell for?

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

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems