Question

(A)-Backbone is a single strong bone. Reason(R) – Backbone forms the main supporting axis of the body.

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Answer 1

Answer:

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Assertion is false because it is made up of small bone units called Vertebrates, hence is is flexible.

Reason is true as it is considered as the main supporting bone of body.

Explanation:

Answer 2

• Because bending a single bone is difficult, the spinal column is made up of many bones. The vertebrae, which make up the backbone, are tiny bones. Seven cervical bones, twelve thoracic bones, five lumbar bones, five sacral bones, and four coccygeal bones make up the spinal cord.
• Because bending a single bone is difficult, the spinal column is made up of many bones. The vertebrae, which make up the backbone, are tiny bones. Seven cervical bones, twelve thoracic bones, five lumbar bones, five sacral bones, and four coccygeal bones make up the spinal cord.
• The spine is a formidable opponent. It can even withstand pressures of hundreds of kilos. This is also a positive thing, because something as simple as sleeping flat on your back with your knees up may be really beneficial.