Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
Ok I think its small polar molecules but I could be wrong.
Adding an enzyme inhibitor to a reaction catalyze by an enzyme
C because he is making a hypothesis that coloration which is the independent variable is making the change.
The correct answer is B. carbon dioxide in the Earth's atmosphere
