To determine which of the following organisms have mature erythrocytes (red blood cells) that have lost their nuclei, we will analyze each option based on biological knowledge.

1. **Fishes**: Most fish have nucleated erythrocytes.
2. **Frogs**: As amphibians, frogs also have nucleated red blood cells.
3. **Birds**: Birds have nucleated erythrocytes.
4. **Mammals**: Mammals are unique among vertebrates as their mature erythrocytes do lose their nuclei.

### Final Answer
Mammals are the only organisms listed that have mature erythrocytes that have lost their nuclei.

Question

To determine which of the following organisms have mature erythrocytes (red blood cells) that have lost their nuclei, we will analyze each option based on biological knowledge.

1. **Fishes**: Most fish have nucleated erythrocytes.
2. **Frogs**: As amphibians, frogs also have nucleated red blood cells.
3. **Birds**: Birds have nucleated erythrocytes. 
4. **Mammals**: Mammals are unique among vertebrates as their mature erythrocytes do lose their nuclei.

### Final Answer
Mammals are the only organisms listed that have mature erythrocytes that have lost their nuclei.

Knowee AI · Accepted Answer

To determine which of the following organisms have mature erythrocytes (red blood cells) that have lost their nuclei, we will analyze each option based on biological knowledge.

1. **Fishes**: Most fish have nucleated erythrocytes.
2. **Frogs**: As amphibians, frogs also have nucleated red blood cells.
3. **Birds**: Birds have nucleated erythrocytes. 
4. **Mammals**: Mammals are unique among vertebrates as their mature erythrocytes do lose their nuclei.

### Final Answer
Mammals are the only organisms listed that have mature erythrocytes that have lost their nuclei.

Which of the following have mature erythrocytes that have lost their nuclei.Multiple choice question.FishesFrogsBirdsMammals

Question

Which of the following have mature erythrocytes that have lost their nuclei?

Solution

Final Answer

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