MCQ
The chondrocytes of connective tissue are
- Afibre secreting cells
- Bbone forming cells
- ✓cartilage cells
- Dbone eating cells
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Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.
$(i)$ Due to alteration of $DNA$ sequences genotype is change.
$(ii)$ Changes occur in phenotype.
$(iii)$ Variation create in $DNA$