To determine whether each statement is true or false, we will analyze each statement one by one.
**Step 1: Analyze Statement (a)**
- Statement: "In Torpedo, the electric organs are capable of generating strong electric shock to paralyze the prey."
- Analysis: Torpedo, which belongs to the class Chondrichthyes (cartilaginous fishes), does indeed have electric organs that can generate strong electric shocks. This is used for defense and to stun prey.
- Conclusion: **True**
**Step 2: Analyze Statement (b)**
- Statement: "Bony fishes use pectoral, pelvic, dorsal, anal and caudal fins in swimming."
- Analysis: Bony fishes (Osteichthyes) do utilize various fins, including pectoral, pelvic, dorsal, anal, and caudal fins, for swimming and maneuvering in water.
- Conclusion: **True**
**Step 3: Analyze Statement (c)**
- Statement: "Amphibian skin is moist and has thick scales."
- Analysis: Amphibians, such as frogs and salamanders, have moist skin that is generally smooth and does not have scales. They rely on their skin for respiration and moisture absorption.
- Conclusion: **False**
**Step 4: Analyze Statement (d)**
- Statement: "Birds are poikilothermous animals."
- Analysis: Birds are not poikilothermic; they are homeothermic, meaning they maintain a constant body temperature regardless of the environment.
- Conclusion: **False**
**Step 5: Analyze Statement (e)**
- Statement: "The most unique mammalian characteristic is the presence of milk-producing mammary glands by which the young ones are nourished."
- Analysis: The presence of mammary glands that produce milk is indeed a defining characteristic of mammals, allowing them to nourish their young.
- Conclusion: **True**
**Final Summary of Statements:**
- (a) True
- (b) True
- (c) False
- (d) False
- (e) True
Thus, the true/false results are:
- A: True
- B: True
- C: False
- D: False
- E: True
**Final Answer:**
- Statements A, B, and E are true; Statements C and D are false.
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