The nucleus, helps identify if the cell is eukaryotic or prokaryotic.
I don’t really understand the question.
<span>A meteor is visible only once because when the meteor enter into the earth’s atmosphere it gets burned up in the process. While the comet may be visible at regular intervals because it rotate in a fixed elliptical orbit around the sun therefore it will stay in its path and eventually will be seen again in the same spot.</span>
<span>The domain that contains unicellular organisms that live in extreme environments is Archaea.</span>
Answer:
No viruses are not considered as living organisms, until they enter the body of the host