Presence of feathers are characteristics of

Question

Question

This question was previously asked in

AMRU HP BSc Nursing Admission Test 7 July 2024 Official Paper

Answer 1

Correct Answer: Aves

Rationale:

Feathers are unique to the class Aves, which includes all birds. These structures play a crucial role in various functions such as flight, insulation, and display for mating rituals.
Feathers have evolved from the scales of reptiles and are composed of the protein keratin. They are lightweight, yet strong and flexible, which is essential for the mechanics of flight.

Explanation of Other Options:

Mammals

Rationale: Mammals are characterized by the presence of mammary glands, hair or fur, and three middle ear bones. They do not have feathers. Instead, they use hair or fur for insulation and sensory functions.

Reptiles

Rationale: Reptiles, such as snakes, lizards, and turtles, have scales made of keratin. They do not possess feathers. Scales serve as protection and help to reduce water loss in these typically terrestrial animals.

Amphibians

Rationale: Amphibians, including frogs, toads, and salamanders, have permeable skin that can absorb water and oxygen. They do not have feathers or scales. Their skin often requires a moist environment to function properly.

Conclusion:

Among the given options, Aves is the correct answer as feathers are a distinct characteristic of birds. Feathers have multiple functions including flight, insulation, and mating displays. The other classes mentioned—Mammals, Reptiles, and Amphibians—do not have feathers and have different skin adaptations suited to their respective environments.