I think it's oxygen and water because they are the substance for cellular respiration.
Answer:
this is just evolution like the birds on the Galapagos islands also I don't see the question
A light microscope, I don't think it would be an electron microscope because we're talking about PRESERVED plant cells.
Answer: The Pulmonary Arteries
Explanation: They are two pulmonary arteries with on serving each human lungs, which brings deoxygenated blood to the lungs from the hilium. The arteries go into the capillaries of the alveoli. Capillaries are the thinnest ,smallest blood vessel,they supply oxygen to single tissues in all parts of the human body.
The correct answer is B. Tundra
Tundras are the coldest places in the world and are located far north, around the arctic circle, and incorporates countries such as Finland, Russia, Alaska, and others.
