Answer:
necessity
I could be wrong because you didnt give me more context but it's fine its probably right.
Arteries carry blood away from the heart to the body.
Answer:
I think it's D
Explanation:
Cause usually a scientist creates a hypothesis or theory so they can prove that it's true.
¯\_(ツ)_/¯
Answer:
Hello!
Primary consumers and producers are two examples of <u>trophic</u> levels, a way to classify living organisms based on their source of nutrients.
Hope this helps!
the tiny blood vessels surrounding the alveoli are called capillaries.
the capillaries have thin walls and are connected to the larger blood vessels ( veins) and they bring oxygen to the heart threw oxygenated blood.
