Can somebody help me ?

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

Number and variety of living organisms includes genetic, species, and ecological types

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria