Correct Answer: Option A
Explanation:
The human endoskeleton consists of 206 bones and cartilage at joints and in structures like the nose, ears, and intervertebral discs. Bone is mineralized connective tissue, cartilage is a specialized connective tissue. Chitin is found in arthropod exoskeleton and fungal walls, keratin is a protein in skin, hair, nails. The skeleton provides support, protection, and movement.
This question belongs to:
Science
Biology
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