The members of which of the following families shows Kranz anatomy?
(a) Compositae and Amaranthacease
(b) Chenopodiaceae and Euphorbiaceae
(c) Gramineae
(d) All of these

Options

A. Compositae and Amaranthacease
B. Chenopodiaceae and Euphorbiaceae
C. Gramineae
D. All of these

Answer

To determine which families show Kranz anatomy, we need to understand what Kranz anatomy is and which plant families exhibit this characteristic.

### Step-by-Step Solution:

1. **Understanding Kranz Anatomy**:
- Kranz anatomy is a specific type of leaf structure found in C4 plants. It is characterized by the presence of two types of cells: mesophyll cells and bundle sheath cells.
- In Kranz anatomy, mesophyll cells are arranged in a ring-like fashion around the bundle sheath cells.

2. **Function of Kranz Anatomy**:
- This anatomical arrangement helps in the efficient concentration of carbon dioxide and minimizes photorespiration, which is beneficial for plants in hot and dry environments.

3. **Identifying Plant Families**:
- The question lists several plant families:
- (a) Compositae and Amaranthaceae
- (b) Chenopodiaceae and Euphorbiaceae
- (c) Gramineae
- (d) All of these

4. **Researching Each Family**:
- **Compositae (Asteraceae)**: Known to include many C4 plants.
- **Amaranthaceae**: Also contains C4 plants with Kranz anatomy.
- **Chenopodiaceae**: Includes species that exhibit Kranz anatomy.
- **Euphorbiaceae**: Some members also show Kranz anatomy.
- **Gramineae (Poaceae)**: This family includes many grasses that exhibit Kranz anatomy.

5. **Conclusion**:
- Since Kranz anatomy is found in all the mentioned families, the correct answer is option (d) All of these.

### Final Answer:
**(d) All of these**