Most of the nitrogen in earths atmosphere comes from bacteria.
It is expressed in joules / kilojoules and calories
Trees, bushes, moss and grass live in a forest habitat.
Answer:
The vascular system
Explanation:
The human blood circularitory system can be used to explain capillary action in the human body, our heart pumps blood in and out with no use of external forces.
The answer to #2 Is a..biota is the life of "a" plant, or animal (etc.) of the particular region/habitat, etc.