KCET · BIOLOGY · STD 12 - 7. Human Health and Disease

Certain tumours are called malignant, because

A they are not neoplastic
B they are confined to specific locations
C they invade and damage surrounding tissues
D they show contact inhibition

Verified Solution

Answer & Solution

Correct Answer

(C) they invade and damage surrounding tissues

Step-by-step Solution

Detailed explanation

(C) they invade and damage surrounding tissues,
The malignant tumours are a mass of profilerating cells called neoplastic or tumour cells. These cells grow very repidly, invading and damaging the surrounding normal tissues.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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