Correlation Between Amphibians and Reptiles: Definition, Similarities, Differences & MCQs

The correlation between amphibians and reptiles is an important topic in zoology and biology exam preparation. Both groups belong to vertebrate animals and share a common evolutionary history, yet they differ in structure, habitat, and reproduction. This post explains their correlation in a simple and easy way.

Definition of Correlation Between Amphibians and Reptiles

The correlation between amphibians and reptiles refers to their evolutionary relationship, shared characteristics, and biological differences, showing how reptiles evolved from amphibian-like ancestors.

Evolutionary Relationship

• Amphibians and reptiles belong to the group Tetrapoda (four-limbed vertebrates).

• Reptiles evolved from primitive amphibians.

• This evolutionary transition helped vertebrates move completely to terrestrial life.

Habitat

• Both amphibians and reptiles are ectothermic (cold-blooded).

• Amphibians usually live in moist environments such as ponds and wetlands.

• Reptiles mainly inhabit dry terrestrial environments, though some live in water.

• Both groups can be found in forests, deserts, wetlands, and aquatic ecosystems.

Skin Structure

Feature	Amphibians	Reptiles
Skin Type	Moist and permeable	Dry and scaly
Function	Gas exchange through skin	Prevents water loss
Adaptation	Aquatic and land life	Fully terrestrial life

Reproduction

• Amphibians:

• Mostly external fertilization
• Eggs laid in water
• Larval stage (tadpole) present

• Reptiles:
• Internal fertilization
• Lay amniotic eggs on land
• No larval stage

Diversity

• Amphibians: Frogs, toads, salamanders, caecilians
• Reptiles: Snakes, lizards, turtles, crocodiles
• Both groups show wide species diversity and adaptation.

Ecological Importance

• Amphibians:

• Control insect populations
• Act as bio-indicators of environmental health

• Reptiles:

• Maintain food chain balance
• Help in nutrient cycling and seed dispersal

MCQs: Correlation of Amphibians and Reptiles

1. Reptiles evolved from which group?

A. Fish

B. Birds

C. Amphibians ✅

D. Mammals

2. Which skin type is found in reptiles?

A. Moist skin

B. Permeable skin

C. Glandular skin

D. Dry scaly skin ✅

3. Amphibians are mainly dependent on which environment for reproduction?

A. Desert

B. Water ✅

C. Air

D. Forest

4. Which feature helped reptiles adapt fully to land life?

A. Gills

B. Amniotic egg ✅

C. Tadpole stage

D. Moist skin

FAQs

What is the correlation between amphibians and reptiles?

It refers to their evolutionary relationship and shared vertebrate characteristics.

Are reptiles descendants of amphibians?

Yes, reptiles evolved from primitive amphibian ancestors.

Give one similarity between amphibians and reptiles.

Both are cold-blooded vertebrate animals.

Conclusion

Amphibians and reptiles share a strong evolutionary correlation but differ in habitat, skin structure, and reproduction. Understanding these similarities and differences is essential for biology and zoology examinations.

Updated for 2026 exam syllabus.