What effect does human development (building roads, houses , cities, etc.) have on ecosystems and the wildlife that lives there?

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

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

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.