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Option 3 : Amphibians' eyes are without eyelids.
The correct answer is Amphibians' eyes are without eyelids.
- Amphibians are those animals who are found both on land & water i.e. amphibians can live in aquatic as well as terrestrial habitats. Hence, option 4 is correct.
- In Amphibians, respiration takes place through the gill, skin, and lungs.
- During hibernation, frogs respire through the skin.
- They have porous skin that requires moisture. i.e the amphibian skin is moist (without scales). Hence, option 1 is correct.
- They have three-chambered hearts, two auricles, and one ventricle.
- Frogs have two transparent eyelids, one on the bottom, one on the top, and a third semi-transparent eyelid called the nictitating membrane.
- Amphibians' eyes have eyelids. Hence, option 3 is not correct.
- The body of Amphibians is divided into the head and trunk.
- In amphibians, a tympanum is located just behind the eye but it does not process sound waves; it simply transmits them to the inner parts of the amphibian's ear which are protected from the entry of water and other foreign objects. Hence, option 2 is correct.
- The tympanum is a large external oval-shaped membrane made up of non-glandular skin.
- They are cold-blooded.
- Examples of Amphibians are Frog, Necturus, Salamander, etc.
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