Question

From the list of characters given below, choose the characteristics which are exclusive to birds:
(a) Pneumatic bones
(b) Lungs with air sacs
(c) Four chambered heart
(d) Homoithermy
(e) Feathers
(f) Scales
O (a), (b), (d) & (e)
O (a), (b) & (e)
O (a), (b)
O (e) only​

Answer 1

Answer:

Showing results for From the list of characters given below, choose the characteristics which are exclusive to birds: (a) Pneumatic bones (b) Lungs with air sacs (c) Four chambered heart (d) Homoiothermy (e) Feathers (of) Scales O (a), (b), (d) & (e) O (a), (b) & (e) O (a), (b) O (e) only

Search instead for From the list of characters given below, choose the characteristics which are exclusive to birds: (a) Pneumatic bones (b) Lungs with air sacs (c) Four chambered heart (d) Homoithermy (e) Feathers (f) Scales O (a), (b), (d) & (e) O (a), (b) & (e) O (a), (b) O (e) only

Answer 2

Answer:

Feathers are exclusive to birds.

Option four is the correct answer.

Know more about birds:

A bird (Latin, Spanish, Portuguese, Italian: Ave, German: Vogel, English: Bird, French: Oiseau) is an amphipod with feathers and wings. In this world some insects and bats have wings, only birds have feathers. We have 10000 species of birds in the world. All living birds belong to the suborder Neornithidae. The order of birds (Aves) is organized into a total of 23 classes, 142 genera, 2057 genera and 9702 species.

However, new species are constantly being discovered by dividing some of the older species. Fossils found so far indicate that birds appeared during the Jurassic period, about 160 million years ago. According to paleontologists, birds are the only descendants of four-limbed dinosaurs after the Cretaceous-Paleogene extinction 650 million years ago. Among living birds, the Humming bird is the smallest (only 5 cm or 2 inches) and the Ostrich is the largest (2.75 m or 9 feet).

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