The correct option is C HeterocoelousThe presence of vertebrae or a vertebral #10;column is one of the defining features of chordates. Different classes of v ...

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Byju's Answer

Standard IX

Biology

Aves

Bird vertebra...

Question

Bird vertebrae are:

Acoelous

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Heterocoelous

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Amphicoelous

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Procoelous

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Solution

The correct option is C Heterocoelous
The presence of vertebrae or a vertebral column is one of the defining features of chordates. Different classes of vertebrates have different kinds of vertebrae.
Birds have heterocoelous vertebrae which are bones with saddle-shaped surfaces. Such a form allows extensive vertical and lateral flexion motion without stretching the nerve cord too much.
So, the correct answer is option B- 'Heterocoelous'.

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