Question

3. The nucleus contains
which are visible as rod shaped structure.​

Answer 1

Chromosomes(or chromatin)

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Answer 2

chromosomes
The nucleus contains chromosomes, which are visible as rod-shaped structures only when the cell is about to divide. Chromosomes contain information for inheritance of features from parents to next generation in form of DNA [Deoxyribo Nucleic Acid) molecules. Chromosomes are composed of DNA and protein.