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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

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to identify which statements are not related to members of the class Chondrichthyes (cartilaginous fishes). Let's analyze each statement one by one: 1. **Terminal mouth**: This feature is typically associated with bony fishes (Osteichthyes), not cartilaginous fishes. Therefore, this statement is **not related** to Chondrichthyes. 2. **Placoid scales on skin**: Placoid scales are characteristic of Chondrichthyes. Thus, this statement is **related** to Chondrichthyes. 3. **Presence of air bladder**: Air bladders are found in bony fishes and are not present in Chondrichthyes. Therefore, this statement is **not related** to Chondrichthyes. 4. **Poikilothermal**: Chondrichthyes are indeed poikilothermal (cold-blooded). Hence, this statement is **related** to Chondrichthyes. 5. **Internal fertilization**: This is a characteristic of Chondrichthyes, as they often exhibit internal fertilization. Therefore, this statement is **related** to Chondrichthyes. 6. **Vivipary**: Many Chondrichthyes give birth to live young (viviparous), so this statement is **related** to Chondrichthyes. Now, let's summarize the statements that are **not related** to Chondrichthyes: - Terminal mouth (1) - Presence of air bladder (3) Thus, there are **2 statements** that are not related to the members of class Chondrichthyes. ### Final Answer: **2 statements are not related to the members of class Chondrichthyes.** ---
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