The Fertilization involving the carrying of male gametes by the pollen tube is called

Options

A. Porogamy
B. Siphonogamy
C. Chalazogamy
D. Syngonogamy

Answer

To solve the question regarding the type of fertilization that involves the carrying of male gametes by the pollen tube, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the type of fertilization where male gametes are carried by the pollen tube.

2. **Identify Key Terms**:
- **Pollen Tube**: A structure that forms after pollen germinates and is responsible for delivering male gametes to the ovule.
- **Male Gametes**: The sperm cells produced by the male reproductive structure.

3. **Review the Options**: The options given are:
- 1. Porogamy
- 2. Siphonogamy
- 3. Chelazogamy
- 4. Syngonogamy

4. **Define Each Option**:
- **Porogamy**: A type of fertilization where the pollen tube enters the ovule through the micropyle, releasing male gametes there.
- **Siphonogamy**: A broader term that describes fertilization involving a pollen tube carrying male gametes.
- **Chelazogamy**: A type of fertilization where the pollen tube releases male gametes at the chalazal end of the ovule.
- **Syngonogamy**: A type of fertilization where male gametes are motile, and no pollen tube is involved.

5. **Analyze the Options**:
- Since the question specifically mentions the carrying of male gametes by the pollen tube, we can eliminate **Syngonogamy** because it does not involve a pollen tube.
- **Siphonogamy** is a general term that includes the process of carrying male gametes by the pollen tube but does not specify the point of entry.
- **Porogamy** and **Chelazogamy** are specific types of Siphonogamy.

6. **Select the Correct Answer**: The question specifically asks for the process involving the carrying of male gametes by the pollen tube. Therefore, the correct answer is **Siphonogamy**, as it encompasses the broader category of fertilization involving pollen tubes.

### Final Answer:
**Siphonogamy**