Answer: nitrogen and hydrogen
N2 +3 H2 ---> 2NH3
Explanation:
<span>What is the approximate age of our solar system?
</span>b. 4.6 billion years
<span>(4) active transport
</span>Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
