Answer:
an ecosystem consists of a population of organism and it's physical environment,and a population is made up many different communities of organism.
Sorry I don't know just try to graduate
Answer:
The body uses these basic units to build substances it needs for growth, ... They are small molecules, so they can be broken down and absorbed by the body C IS THE ANSWER
Explanation:
Every cell in the body is enclosed by a cell (Plasma) membrane. The cell membrane separates the material outside the cell, extracellular, from the material inside the cell, intracellular. It maintains the integrity of a cell and controls passage of materials into and out of the cell.
Increasing your heart rate
