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Question
Characteristic features such as four-chambered heart, feathers, and hollow bones are applicable to which class of vertebrates?
Characteristic features such as four-chambered heart, feathers, and hollow bones are applicable to which class of vertebrates?
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Solution
The correct option is B Aves
- Birds have a well-developed four-chambered heart.
- The body is covered with feathers.
- Forelimbs are modified into wings.
- Bones in birds are hollow; such bones are called pneumatic bones.
- All these are important flight adaptations and help in their aerial mode of life.
Thus, the correct answer is option B.
- Birds have a well-developed four-chambered heart.
- The body is covered with feathers.
- Forelimbs are modified into wings.
- Bones in birds are hollow; such bones are called pneumatic bones.
- All these are important flight adaptations and help in their aerial mode of life.
Thus, the correct answer is option B.
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