関連ワード:  what is not present in a animal cell    what is not found in a animal cell    what is not present in most animal cells    what is not present in any animal cells    what organelle is not found in a animal cell    what structure is not present in animal cells    which of these is not present in a animal cell    what outer covering is not present in animal cells    what plant organelle is not present in animal cells    what part is not present in an animal cell