Based on your understanding of biology, describe the relationship between these terms (definitions of each term will NOT be accepted): pathogen
virus
vector
emerging disease

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

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Which type of landforms forms at the plate boundary as a result of divergent stress