changed variable
responded variable
variable that remains the same
invented the first mircoscope
all plants and animals are made up of cells
cells arise from pre-exisiting cells
first one to observe living single celled organisms, that he called "animalcules"
disporved spontaneous generatiob using S-flask experiment with broth
observed empty chambers in cork that he called "cells"
observed the nucleus in cells
did experiment with meat in jars to discredit spontaneous generation