There are several types of microscopes: compound microscopes 0 the most commonly used microscope, uses light illumination and the image that is seen is two dimensional, stereoscope- uses light illumination and the image that appears is 3 dimensional, confocal microscope - uses laser light ,scanning electron microscope - uses electron illumination.
Sexual means something physical and sexual reproduction is the creation of an offspring.
Fertilizer, waste Water ,automobile,exhaust,animal waste
I think you're looking for Cellular differentiation