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What is a nucleus – Parts of a cell – Biology

By |2017-05-29T00:35:47+00:00May 29th, 2017|Biology|

An onion skin cell (seen through a microscope) You can see the nucleus inside each cell The earliest cells, and all prokaryote cells, don't have a nucleus. Inside these simple cells, the DNA molecules just float around in the cytoplasm. This is a nice simple arrangement, but it's risky - the DNA often [...]