Which of the following statements are incorrect regarding class Amphib...
Incorrect Statement: (iii) Has scales in all its members.
Explanation:
- Class Amphibia is a class of vertebrates that includes frogs, toads, salamanders, and newts.
- They are characterized by several unique features and adaptations that distinguish them from other classes of animals.
- Let's evaluate each statement to identify the incorrect one.
(i) Has body divisible into head and trunk. Tail is present in some amphibians.
- This statement is correct. Amphibians have a body that can be divided into a distinct head and trunk. Additionally, some amphibians, such as tadpoles, have a tail during their larval stage.
(ii) Show respiration by gills, lungs and through the skin.
- This statement is correct. Amphibians exhibit various modes of respiration. They respire through gills during their larval stage when they live in water. As they metamorphose into adults, they develop lungs for respiration. Additionally, their moist and permeable skin allows for gas exchange.
(iii) Has scales in all its members.
- This statement is incorrect. Unlike reptiles, which have scales, amphibians do not possess scales. Instead, their skin is smooth, moist, and glandular.
(iv) Can lead dual life (aquatic and terrestrial).
- This statement is correct. Amphibians are known for their ability to live both in water and on land. They undergo a distinct life cycle, starting as aquatic larvae with gills and eventually transforming into adults that can live on land and respire through lungs.
(v) Has eyelids.
- This statement is correct. Amphibians, including frogs and toads, have movable eyelids that allow them to protect and moisten their eyes.
Conclusion:
- Among the given statements, statement (iii) "Has scales in all its members" is incorrect. Amphibians do not have scales; instead, they have smooth, moist skin.
- Therefore, the correct answer is option 'C': Only (iii) is incorrect.
Which of the following statements are incorrect regarding class Amphib...
Amphibians do not have scales.