Explain how you will represent the water cycle, nitrogen cycle, phosphorus cycle, & carbon cycle in your aquatic ecosystem. explain their importance when creating a self-sustainable aquatic ecosystem.

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 are the student's observations and inferences before he starts his investigation?

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?