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Select the option with a correct representation of an animal belonging to the below mentioned class of vertebrates.
I. The notochord is persisitent throughout life. The mouth is ventral.
II. The skin is moist without scales . The tail may be present.
III. 6 to 15 pairs of gill slits. Jaws absent.
IV. Viviparous usually. pinna present in most of the members.

A

`{:(I,II, III,IV),("Dog fish", "Ichthyophis","Calotes","Cains"):}`

B

`{:(I,II, III,IV),("Hagfish", "Salamandra","Betta","Aptenodytes"):}`

C

`{:(I,II, III,IV),("Pristis", "Hyla","Lamprey","Pteropus"):}`

D

`{:(I,II, III,IV),("Clarius", "Rana","Myxine","Delphinus"):}`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each statement and identify the correct representation of an animal belonging to the specified class of vertebrates. ### Step-by-Step Solution: 1. **Analyzing Statement I:** - The notochord is persistent throughout life, and the mouth is ventral. - This characteristic is found in **Hagfish** (a type of cyclostome). In these animals, the notochord remains throughout their life, and they have a ventral mouth. 2. **Analyzing Statement II:** - The skin is moist without scales, and the tail may be present. - This description fits **Amphibians**, particularly **Salamanders**, which have moist skin and lack scales. 3. **Analyzing Statement III:** - 6 to 15 pairs of gill slits, jaws absent. - This is a characteristic of **Cyclostomes** (like lampreys and hagfish), which have multiple gill slits and lack jaws. 4. **Analyzing Statement IV:** - Viviparous usually, pinna present in most members. - This description is typical of **Mammals**, particularly those that are viviparous (giving birth to live young) and have external ears (pinna). ### Conclusion: Based on the analysis: - Statement I corresponds to **Hagfish**. - Statement II corresponds to **Salamanders**. - Statement III corresponds to **Cyclostomes**. - Statement IV corresponds to **Mammals**. The correct option that represents an animal belonging to the class of vertebrates described in the statements is **Option 2** (which likely refers to Amphibians).
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