Question

Which of the following is an avian character?
A. Presence of feathers
B. Presence of hollow bones
C. Forelimbs are modified in wings
D. All of the above

Solution:

Answer 1

Hint: Birds are related to everything avian. The bird virus that birds may transmit to humans is known as avian flu. Aviators are people who fly aeroplanes, which may help you recall that avian items include birds. In birds, feathers are anatomical features. Waterfowl, psittacine birds, game birds, and poultry are among the avian species that are in some manner governed by ISDA.

Complete step-by-step solution:
Aves are warm-blooded, oviparous, bipedal, feathered, winged, and toothless animals with a tetra-locular heart, a complex respiratory system, an extremely high body temperature, and a vigorous metabolism, and strong flying abilities.
The only outward characteristic that sets birds apart from other animals is their feathers.
The skin that makes up feathers is loose and dry, creating an insulating covering that protects the bird from the elements and helps to maintain its body temperature.
Birds are known for having hollow, light bones, which contribute to their ability to lose weight.
With a huge surface area and minimal weight, the forelimbs are well adapted for flight. providing birds, with the ability to fly as a result.

Hence, option D is correct, i.e., all of the above.

The avian characteristics are the presence of feathers, the presence of hollow bones, and forelimbs that are modified into wings.

Note: Some reptile species exhibit a number of avian traits. Bipedality, pneumatic bones, the pre-lacrimal fossa, fewer digits, a simpler hind limb with a metatarsal joint, and other traits shared by birds and dinosaurs include: Birds share a tetra-locular heart with mammals and crocodilians, as well as warm blood.