The major amount of `CO_(2)` in both invertebrates and verterbrates is transported as :

Options

A. Carbonic acid
B. Carbonminohaemoglobin
C. Bicarbonates
D. None of these

Answer

To solve the question regarding how the major amount of carbon dioxide (CO₂) is transported in both invertebrates and vertebrates, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding CO₂ Transport**:
- Carbon dioxide produced in the tissues needs to be transported to the lungs for exhalation. There are different forms in which CO₂ can be transported in the blood.

2. **Identifying the Options**:
- The options given are:
- A) Carbonic Acid
- B) Carbaminohemoglobin
- C) Bicarbonate
- D) None of these

3. **Analyzing Each Option**:
- **A) Carbonic Acid**:
- Carbonic acid (H₂CO₃) is formed when CO₂ reacts with water in the blood. However, it is not the major form of transport for CO₂. It can contribute to acidity but is not the primary transport form.
- **B) Carbaminohemoglobin**:
- This refers to hemoglobin bound to carbon dioxide. While it does play a role in CO₂ transport, it is not the predominant form.
- **C) Bicarbonate**:
- The majority of CO₂ is transported in the form of bicarbonate ions (HCO₃⁻). This occurs when CO₂ reacts with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions. This is the primary method of CO₂ transport in both invertebrates and vertebrates.
- **D) None of these**:
- Since we have identified bicarbonate as the major form of CO₂ transport, this option is incorrect.

4. **Conclusion**:
- The major amount of CO₂ in both invertebrates and vertebrates is transported as **Bicarbonate (HCO₃⁻)**.

### Final Answer:
The major amount of CO₂ in both invertebrates and vertebrates is transported as **Bicarbonate**.

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