<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).
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decomposing and recycling organic materials in it's habitat.
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I don't know, and just to let you know B is not a number its a letter
Explanation:
Wait, what? Are you talking about a cell simulation program?
Evolved from past organisms hope this helps!!!!