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Count the number of statements which are...

Count the number of statements which are not related to the members of class chondrichthyes:-
(a) terminal mouth
(b) placoid scales on skin
(c) presence of air bladder
(d) poikilothermal
(e) internal fertilization
(f) vivipary

A

one

B

two

C

three

D

Four

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AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each statement provided and determine whether it is related to members of the class Chondrichthyes (cartilaginous fishes) or not. ### Step-by-Step Solution: 1. **Statement (a): Terminal mouth** - Chondrichthyes have a ventrally located mouth, not a terminal mouth. - **Conclusion**: This statement is **not related** to Chondrichthyes. 2. **Statement (b): Placoid scales on skin** - Chondrichthyes are known to have placoid scales on their skin. - **Conclusion**: This statement is **related** to Chondrichthyes. 3. **Statement (c): Presence of air bladder** - Chondrichthyes do not possess an air bladder; instead, they have a cartilaginous skeleton and rely on buoyancy from their oil-filled liver. - **Conclusion**: This statement is **not related** to Chondrichthyes. 4. **Statement (d): Poikilothermal** - Chondrichthyes are poikilothermic (cold-blooded) animals. - **Conclusion**: This statement is **related** to Chondrichthyes. 5. **Statement (e): Internal fertilization** - Most Chondrichthyes exhibit internal fertilization. - **Conclusion**: This statement is **related** to Chondrichthyes. 6. **Statement (f): Vivipary** - Some Chondrichthyes are viviparous, meaning they give birth to live young, but many are oviparous (lay eggs). - **Conclusion**: This statement is **related** to Chondrichthyes, although not all members are viviparous. ### Summary of Findings: - Statements not related to Chondrichthyes: (a) Terminal mouth, (c) Presence of air bladder. - Total number of statements not related: **2** ### Final Answer: The number of statements which are not related to the members of class Chondrichthyes is **2**. ---
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