As americans moved west, they built the railroad and then many new towns and cities. also, as americans moved west, the buffalo population declined. why?

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

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.