So all we know is that the student stated something ("<span>if plants are added to an indoor environment the air quality will improve
"). This is only a statement - it's not a test whether this statement is true yet.
So the correct answer is: it is a hypothesis.
</span>
Answer:
There are many functions of the circulatory or cardiovascular system. It pumps blood to the heart, transports nutrients and oxygen to cells, and helps provide nourishment to the body. Without it, our body would not be able to fight off diseases or stabilize temperature and pH. It also provides fluid balance.
Explanation:
1. D. Glycolysis
2. D. Light energy is converted into chemical energy
Correct one should be
<span>osmosis.</span>
The radius of the circle would be 7.42in