A. can be used as an energy source by organisms.
DNA is made up of sugars and bases.
Fats are not glucose monomers. Carbohydrates are made up of glucose monomers.
The answer is that it means that the oxygen would be difficult to carry throughout the body, which happens that ATP would be lacking. Because to create energy there’s a need for respiration and it requires an oxygen. Also, other body systems will slow down because anaerobic respiration doesn't create enough ATP for the entire body.
Answer: It depends on if your only talking about plants if so the answer is coal.
Explanation: The reason being because coal only forms from the compaction of dead plants whereas petroleum forms from compacted plants and animals.
When we breathe in, oxygen enters our lungs and enters small sacs in our lungs called the alveoli. In the alveoli, the oxygen diffuses INTO the bloodstream through small blood vessels, called capillaries, that surround these alveoli. The oxygen is now in our bloodstream instead of our lungs and is used in cell respiration etc.
Oppositely, carbon dioxide is diffused FROM the bloodstream TO the alveoli, also through these capillaries. The carbon dioxide is now in the lungs instead of the bloodstream and when you breathe out, the carbon dioxide is breathed out out of your lungs.
Hope this helped, even if it helped a tiny bit. :)
