Which of the following animals possesses blood with haemoglobin in plasma?
(i) Earthworm `" "` (ii) Balanoglossos
(iii) Snail `" "` (iv) Butterfly .

Options

A. (i), and (iv)
B. (ii) and (iii)
C. (i), (ii) and (iv)
D. (ii) and (iv)

Answer

To determine which of the listed animals possess blood with hemoglobin in plasma, we will analyze each option one by one.

1. **Earthworm**:
- Earthworms have blood that contains hemoglobin. The hemoglobin in earthworms is dissolved in their plasma, giving their blood a red color. This allows them to transport oxygen effectively.
- **Conclusion**: Earthworm possesses blood with hemoglobin in plasma.

2. **Balanoglossus**:
- Balanoglossus, a type of hemichordate, does not have hemoglobin in its blood. Instead, it contains a different pigment known as vanadium, which is not related to hemoglobin.
- **Conclusion**: Balanoglossus does not possess blood with hemoglobin in plasma.

3. **Snail**:
- Snails have a respiratory pigment called hemocyanin, which contains copper instead of iron. Hemocyanin is not hemoglobin, and thus, snails do not have blood with hemoglobin in plasma.
- **Conclusion**: Snail does not possess blood with hemoglobin in plasma.

4. **Butterfly**:
- Butterflies, like other insects, do have hemoglobin, but it is present in their tissues rather than dissolved in the plasma. However, some studies indicate that certain insects can have hemoglobin in their blood, contributing to oxygen transport.
- **Conclusion**: Butterfly possesses blood with hemoglobin in plasma.

**Final Answer**: The animals that possess blood with hemoglobin in plasma are **Earthworm** and **Butterfly**.