The nucleus is an organelle found in eukaryotic cells. Inside its fully-enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.
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the second one is 1, the first one is 3, the last one is 5, the fourth one is 2 and the third one is 4
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Your answer should be... Without them, complex organisms cannot perform different functions.
the answers I put is wrong