The fertilisation in which male gametes are carried through pollen tube is known as

Options

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

Explanation

To solve the question regarding the type of fertilization in which male gametes are carried through the pollen tube, we can analyze the provided options step by step:

### Step 1: Understand the Options
The options given are:
- A) Syngamy
- B) Porogamy
- C) Siphonogamy
- D) Chalazogamy

### Step 2: Define Each Term
1. **Syngamy**: This refers to the fusion of male and female gametes. It does not specifically involve the mechanism of how male gametes are delivered.

2. **Porogamy**: This is the process where the pollen tube enters the ovule through the micropyle. It describes the entry point of the pollen tube but not the transport of male gametes.

3. **Siphonogamy**: This term describes the condition in which pollen tubes are developed specifically for the transfer of male gametes. It indicates that the male gametes are indeed carried through the pollen tube.

4. **Chalazogamy**: This refers to a process where the pollen tube penetrates the embryo sac at the chalazal end. It describes a specific point of entry but does not focus on the transport of male gametes through the pollen tube.

### Step 3: Identify the Correct Answer
Based on the definitions:
- **Siphonogamy** is the correct answer, as it specifically refers to the fertilization process where male gametes are carried through the pollen tube.

### Final Answer
The fertilization in which male gametes are carried through the pollen tube is known as **Siphonogamy**.

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