Nitrogen-fixing bacteria change nitrogen into a form of soluble nitrates that plants can use ...the air is 80% nitrogen but it is in N2 form which plants cannot use
<span>When the landmasses are again collected together in a specific area
The Pangea theory supports the theory of plate tectonics because it is based on the idea that all the present continents were one super-continent. For reasons still unknown, the super-continent got separated and created separate smaller continents. This theory also supports the fact that this movement will continue until the day arrives when all the smaller continents will again merge in a different configuration to create another super-continent. </span>
The answer is; graph A
Breathing increases during exercise because the body is demanding more oxygen for the muscles. The hypothalamus detects the increased carbon dioxide in the blood dur9ng exercise and its commands the lungs to breath faster and deeper. When exercise stops, the body is restored to resting through homeostasis.
The branch of biology dealing with interactions along organisms and between organisms and their environment is called Ecology, I believe.
They basically do most of the work in the cells and are required for the structure, function, and regulation of the body's tissues and organs. (made up of thousands of smaller units called amino acids)
