Ncert Exercises & Solutions

In malignant tumours, the cells proliferate, grow rapidly and move to other parts of the body to form new tumours. This stage of disease is called:

1. metagenesis
2. metastasis
3. teratogenesis
4. mitosis

Cancer is defined as an uncontrolled division or proliferation of cells without any Gitforontiation. Repeated division of cells form a large mass of tissue called tumours, Tumours are of two types ie., benign (non-cancerous) and malignant (cancerous) The invasion of cancerous cells (in malignant tumours) from one part to the other parts of body is called metastasis, while metagenesis is the alteration of generation. Tetragenesis is a prenatal toxicity characterised by structural, functional defects in the developing embryo or fetus. Mitosis is a type of cell division that resulls in two daughter cells.

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