Please be a little more specific on what you want to ask. I can be of some help.
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Ty lodibels
Carbon is returned to atmosphere by processes like respiration, decaying and burning. It's absorbed from atmosphere by processes like photosynthesis.
Explanation:
Carbon cycle is a diagramatic approach to explain how the mass of carbon is distributed in our atmosphere, biosphere and earth, and how the cyclic processes run to exchange the carbon mass between themselves.
As far as the pool is concerned, carbon is present as carbon dioxide in the atmosphere. Its from where the carbon is taken from, or is deposited into. Carbon dioxide is given off into atmosphere by means of respiration. Its contributed by each and every living creature which are aerobic and take in oxygen releasing carbon dioxide into the atmosphere. Next process is decaying of organic matters by bacteria and other microorganisms which release carbon dioxide into air. The third process is burning of fuels which releases carbon dioxide and Carbon monoxide into air.
There are several processes by which carbon dioxide is absorbed into the system from atmosphere. One and the most important of them is photosynthesis. This process absorbs carbon dioxide to produce glucose and other organic matters that are then consumed by the whole biosphere as food.
The biconcave cells in blood that lack nuclei when they are mature are the red blood corpuscles.
<u>Explanation:</u>
The blood contains a combination of cells especially the Red blood corpuscles, white blood corpuscles and the blood platelets. The major function of the Red blood corpuscles is to carry oxygen and supply to all the parts of the body from the lungs and similarly carry carbon dioxide and supply to all parts of the body . To facilitate this it does not have a nuclei.
I would say B, <span>differ greatly between single solar systems. As we all know, I believe this is the only planet with life, but there might be many out there, too. Each planet should have very different characteristics unlike ours. So it may vary.</span>
