Blood is red but no RBCs are found in

Options

A. Frog
B. Rabbit
C. Man
D. earthworm

Answer

**Step-by-Step Solution:**

1. **Understanding Blood Color**: Blood is typically red due to the presence of hemoglobin, which is a respiratory pigment responsible for transporting oxygen.

2. **Identifying the Organisms**: The question presents four options: frog, rabbit, man, and earthworm. We need to determine in which of these organisms blood is red but lacks red blood cells (RBCs).

3. **Analyzing Earthworm Blood Composition**: In earthworms, the blood is indeed red because it contains hemoglobin. However, unlike mammals and amphibians, the hemoglobin in earthworms is dissolved in the blood plasma rather than being contained within red blood cells.

4. **Comparing with Other Organisms**:
- In frogs, rabbits, and humans, hemoglobin is present within red blood cells. This means that these organisms do have RBCs in their blood.
- Therefore, they do not fit the criteria of having red blood without RBCs.

5. **Conclusion**: Since earthworms have red blood due to dissolved hemoglobin and do not possess red blood cells, the correct answer to the question is "earthworm."

**Final Answer**: Earthworm

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