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RBCs are nucleated in...

RBCs are nucleated in

A

Man

B

Rabbit

C

Rat

D

Frog

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Question**: The question asks in which organism red blood cells (RBCs) are nucleated. 2. **Analyzing the Options**: - **Option 1: Man** - In humans, RBCs are not nucleated. They lose their nucleus during maturation to maximize space for hemoglobin, which carries oxygen. - **Option 2: Rabbit** - Similar to humans, rabbits also have non-nucleated RBCs. - **Option 3: Rat** - Rats, like other mammals, have non-nucleated RBCs. - **Option 4: Frog** - Frogs are amphibians, and their RBCs are nucleated. This is a characteristic feature of amphibians. 3. **Conclusion**: Based on the analysis, the correct answer is that RBCs are nucleated in frogs. 4. **Final Answer**: The correct option is **4. Frog**.
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