A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called

Options

A. Polygamous
B. Cleistogamous
C. Cleistocarpic
D. Autogamous

Answer

To solve the question regarding the type of flower that never opens and has its pollen grains germinate inside the anther, leading to fertilization of the ovules, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Flower Types**:
- Flowers can be classified based on their reproductive strategies. We need to identify the type of flower that does not open and relies on self-pollination.

2. **Identifying Key Terms**:
- The question mentions that the flower never opens and that the pollen grains germinate inside the anther. This indicates a specific reproductive strategy.

3. **Exploring Flower Mechanisms**:
- In flowering plants, there are two main types of pollination:
- **Self-pollination** (where pollen from the same flower fertilizes the ovules)
- **Cross-pollination** (where pollen from one flower fertilizes the ovules of another flower).
- The flower in question does not open, which suggests that cross-pollination is not possible.

4. **Defining Clistogamy**:
- The term "clistogamous" refers to flowers that do not open and are capable of self-pollination. This is a closed reproductive strategy where fertilization occurs within the closed flower.

5. **Eliminating Other Options**:
- **Polygamous** flowers can have male and female flowers and typically involve cross-pollination, which is not applicable here since the flower does not open.
- **Autogamous** refers to self-pollination but can occur in both open and closed flowers. Since the flower never opens, this term is not specific enough.
- **Clistocarpic** is not a recognized term in this context and can be eliminated.

6. **Conclusion**:
- Based on the definitions and characteristics discussed, the flower that never opens and has its pollen grains germinate inside the anther is called a **clistogamous flower**.

### Final Answer:
The answer to the question is **B) Clistogamous**.

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