Answer:
Within your blood, red blood cells have a specialized task. ... Your blood then transports carbon dioxide back to the lungs where you can ... They extend like tree branches into the lung.
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Answer:
fossils provide solid evidence that organisms from the past are not the same as found today.
Explanation:
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The answer to this question is #2 it has guanine and ribose!
A bc it takes in CO and releases oxygen
<span>B. Marsupials. </span>Amniotic eggs is a unique kind of egg because they possess a semipermeable shell to protect the egg but it also allows gas exchange. Inside an amniotic egg contains the amnion, chorion and allantois. Animals that lay amniotic eggs are called amniotes, which include reptiles, birds, dinosaurs, monotremes (platypus).