Question

Which among the following have scales?

• A. Amphibians
• B. Pisces
• C. Reptiles
• D. Mammals

Answer 1

Answer: (B), (C)

Reptiles

The correct option is C.

Explanation of correct option:

1. True fishes are included in the Pisces superclass.
2. Fishes are classified into two groups based on their endoskeletons: bony fishes and cartilaginous fishes.
3. Both of their bodies are covered in scales.
4. Cycloid scales are found on bony fish.
5. Placoid scales are found on cartilaginous fish.
6. Sharks have scales that have been changed.
7. The skin of reptiles is dry.
8. Their bodies are covered in scales.
9. The skin of several reptiles is covered in hard protective scales.
10. Keratin scales are seen on reptiles.
11. Scales are the skin's waterproof barrier.
12. It allows them to survive in the absence of water.

Explanation of incorrect option:

Option A:

1. Amphi means "dual," and they have two habitats.
2. They may live both on land and in water.
3. In order to exist in both habitats, they require respiratory structure.
4. They have wet skin that also serves as a means of respiration.
5. Amphibians do not have scales on their bodies as a result of this.

Option D:

1. Human beings are mammals.
2. Mammalian skin has hair, fur, and sweat glands.
3. Mammary glands are sweat glands that have been changed.
4. They have no scales on their bodies.

Final answer: Pisces and reptiles have scales.