Biology which type of cell does not have a cell wall

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 bones are there in the human body?

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?