Question:
All enlisted animals lay eggs except
All enlisted animals lay eggs except
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Seals are mammals, and mammals are viviparous (giving birth to live young). Reptiles (crocodiles, turtles) and amphibians (frogs) are oviparous and lay eggs.
Updated On: Aug 3, 2026
- Crocodiles
- Seals
- Frogs
- Turtles
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Animals are classified as oviparous (egg-laying) or viviparous (giving birth to live young) based on their reproductive strategy.
Step 2: Detailed Explanation:
Let us analyze the reproductive biology of each animal:
- Crocodiles (A): These are reptiles. All crocodilians are oviparous; they construct nests on land and lay hard-shelled eggs.
- Frogs (C): These are amphibians. Most frogs are oviparous, laying gelatinous eggs (spawn) directly in water, which hatch into free-swimming tadpoles.
- Turtles (D): These are reptiles. All marine and terrestrial turtles are oviparous; females dig nests in the sand or soil to deposit their soft-shelled eggs.
- Seals (B): These are marine mammals (pinnipeds). Like almost all other mammals (excluding monotremes), seals are viviparous. They undergo placental gestation, give birth to live young (pups) on land or ice, and nurse them with nutrient-rich milk.
Therefore, seals are the only animals among the options that do not lay eggs.
Step 3: Final Answer:
The animal that does not lay eggs is the Seal, corresponding to option (B).
Animals are classified as oviparous (egg-laying) or viviparous (giving birth to live young) based on their reproductive strategy.
Step 2: Detailed Explanation:
Let us analyze the reproductive biology of each animal:
- Crocodiles (A): These are reptiles. All crocodilians are oviparous; they construct nests on land and lay hard-shelled eggs.
- Frogs (C): These are amphibians. Most frogs are oviparous, laying gelatinous eggs (spawn) directly in water, which hatch into free-swimming tadpoles.
- Turtles (D): These are reptiles. All marine and terrestrial turtles are oviparous; females dig nests in the sand or soil to deposit their soft-shelled eggs.
- Seals (B): These are marine mammals (pinnipeds). Like almost all other mammals (excluding monotremes), seals are viviparous. They undergo placental gestation, give birth to live young (pups) on land or ice, and nurse them with nutrient-rich milk.
Therefore, seals are the only animals among the options that do not lay eggs.
Step 3: Final Answer:
The animal that does not lay eggs is the Seal, corresponding to option (B).
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