NCERT · Class 11 · Biology · Animal KingdomThe unique feature of mammals is:
Step-by-Step Solution
The presence of mammary glands (milk-producing glands) is the unique and defining characteristic feature of all mammals.
Detailed Options Breakdown
Option : Hair on skin
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Animal Kingdom.
Option 1: Mammary glands (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Pinnae
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Animal Kingdom.
Option 3: Four-chambered heart
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Animal Kingdom.
💡 Study Guide: This question tests core syllabus concepts from Animal Kingdom. For formulas, key summaries, and mock exam reference guides, read the full Animal Kingdom Revision Notes.