1. most of the energy
2. light and heat
Nitrogen fixation is the process where atmospheric nitrogen is converted by bacteria into biologically usable forms.
plant can not take nitrogen directly from the leaves.
The autonomic nervous system<span> plays an essential </span>role<span> in </span>keeping the body'sinternal environment (temperature, salt concentration, blood sugar, oxygen and carbon dioxide level in blood, etc) in proper balance, a condition calledhomeostasis<span>. ... These and other </span>body<span> actions are controlled by the autonomic</span>nervous system<span>.
Hope this helps :)</span>
