Question

1.The presence of hollow and light bones is a characteristic feature of class ……………​

Answer 1

Answer:

Characteristics of Birds

Explanation:

Pneumatic bones are bones that are hollow rather than filled with tissue, containing air spaces that are sometimes connected to air sacs. Airflow through bird lungs travels in one direction, creating a cross-current exchange with the blood.

Answer 2

Answer:

● The presence of hollow and light bones is a characteristic feature of class Birds.