The key feature distinguishing a malignant tumor from a benign tumor is:
- A
Absence of cell membranes
- B
Slower mitosis
- C
Loss of cytoplasm
- Dcheck_circle
Ability to invade tissues and metastasize
Explanation
Malignant cells break free, invade nearby tissues, and seed secondary tumors elsewhere (metastasis). Benign tumors stay localized.