A: Heritiera has pneumatophores.
R: Respiratory roots are also called pneumathodes.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the assertion and reason question regarding Heritiera and pneumathodes, we can break down the explanation into a step-by-step solution:

### Step 1: Understand the Assertion
- **Assertion (A)**: Heritiera has pneumatophores.
- **Explanation**: Heritiera is a genus of trees that typically grows in marshy areas. These trees have specialized roots known as pneumatophores, which are adapted to help them survive in waterlogged conditions.

### Step 2: Understand the Reason
- **Reason (R)**: Respiratory roots are also called pneumathodes.
- **Explanation**: Pneumatodes are specialized structures that help in gas exchange. In the context of Heritiera and similar plants, the roots that emerge above the soil surface are called pneumatophores, and they have small pores (lenticels) that facilitate the absorption of oxygen from the atmosphere.

### Step 3: Analyze Both Statements
- Both statements are true:
- Heritiera does indeed have pneumatophores.
- The term "pneumatodes" refers to the respiratory function of these roots, which is accurate.

### Step 4: Determine the Relationship Between A and R
- The reason (R) explains why the assertion (A) is true. The presence of pneumatophores in Heritiera is directly related to the need for respiratory roots to absorb oxygen in low-oxygen environments.

### Conclusion
- Since both the assertion and reason are true, and the reason correctly explains the assertion, the answer to the question is that both A and R are true, and R is the correct explanation of A.

### Final Answer
- The correct answer is option 1: Both A and R are true, and R is the correct explanation of A.

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