A vertebra having convexity both in front and behind is

Acoelous

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Procoelus

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Amphicoelous

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Amphiplatyon

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Solution

The correct option is A Acoelous
The vertebral column is formed by serially arranged units called vertebrae and is dorsally placed is dorsally placed. Each vertebra has a central hollow portion (neural canal) through which the spinal cord passes.
A vertebra having convexity both in front and behind is called acoelous vertebra.
Mammals are acoelous
So, the correct answer is 'Acoelous'

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