How many cells result in meiosis 1 and 2

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

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

What is the difference between how ionic and covalent bonds form