As populations increase in size, more births
cause the population to increase even more.
This is called

A negative feedback
B. exponential growth.
C homeostasis
D. carrying capacity.

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 blood vessels carry blood to the heart? away from the heart?

Organ systems are composed of organs, organs are composed of tissues, and tissues are composed of cells. this pattern is organized into levels. organization based on levels can be found in what