Why do biologists measure the number of trophic levels in an ecosystem? A. To find new treatments for diseases
B. To make it helpful for humans
C. To see if it has any food chains
D. To check its stability and health

The development of_ factored in the development of complex organisms.

What is the name for a substance formed in a chemical reaction

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body