What power lens should he use as a magnifier to see clearly at a distance of 15 cm without wearing his glasses?

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

How many cells are our body made of ? ♡

What is the number of phosphates in an atp molecule