Answer: plants such as trees convert carbon dioxide into oxygen, which gives the earth a constant supply of oxygen.
Explanation:
Answer:
Protists help break down dead material and help produce oxygen
Explanation:
I just took the quiz on k12
Answer:
It is dangerous if directly inhaled, it is not a very abundant energy source and it releases the most toxins when burned i think :))
Explanation:
Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
<span>arachidonic acid is your answer
hope i helped and warm wishes to you</span>
