Question

The long bones are hollow and connected by air
passages these are characteristics of
(a) mammals
(b) reptiles
(c) birds
(d) all land vertebrates

Answer 1

Answer:

I think option c is ur answer hope it helps...

Answer 2

The long hollow bones connected by air passages are characteristics of

(c) Birds

Explanation:

Birds belong to the class Aves and are warm blooded vertebrates.

Their main characteristics include feathers, toothless beaks, hard shelled eggs. They have a four chambered heart with a high metabolic rate.

Birds posses a strong yet light weight skeleton. Their bones are lighter than mammals. Their long bones are mostly hollow and sometimes act as a part of their respiratory system.

These hollow bones reduce their body weight and helps them in flying