If many pollen tubes come out of a pollen grain during its germination, the condition is regarded as

Options

A. Polygamous
B. Polyandrous
C. Polysiphonous
D. Polytrichous

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Germination**: During the process of fertilization in flowering plants, pollen grains germinate on the stigma of a flower. This germination leads to the formation of pollen tubes that grow down the style towards the ovule.

2. **Identifying the Condition**: The question asks about the condition when many pollen tubes emerge from a single pollen grain. This is an unusual occurrence, as typically only one pollen tube is produced from each pollen grain.

3. **Exploring the Options**:
- **Option 1: Polygamous**: This term refers to a plant that has different types of flowers (some male, some female, and some bisexual). This does not relate to the number of pollen tubes produced.
- **Option 2: Polyandrous**: This refers to flowers where all stamens are free and not clustered together. This does not apply to the number of pollen tubes either.
- **Option 3: Polysiphonous**: This term describes the condition where multiple pollen tubes arise from a single pollen grain. This is the correct term for the situation described in the question.
- **Option 4: Polytrichus**: This term refers to something that is densely covered with hair. It does not pertain to pollen tube formation.

4. **Conclusion**: Based on the definitions and the context of the question, the correct answer is **Polysiphonous**. This condition is characterized by the production of many pollen tubes from one pollen grain during germination.

**Final Answer**: If many pollen tubes come out of a pollen grain during its germination, the condition is regarded as **Polysiphonous**.

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