The process whereby the male gametes are brought to the egg by a pollen tube is called

Options

A. porogamy
B. siphonogamy
C. syngamy
D. calazogamy

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process in which male gametes are transported to the egg via a pollen tube in flowering plants.

2. **Identifying Key Structures**: In flowering plants (angiosperms), the key structures involved are the stigma, style, ovary, and the embryo sac. The stigma is where pollen grains land.

3. **Pollen Tube Formation**: When pollen grains settle on the stigma, they germinate and form a pollen tube. This tube is essential for transporting the male gametes (sperm cells) to the egg.

4. **Terminology**: The formation of the pollen tube is specifically referred to as **syphnogamy**.

5. **Pollen Tube Pathway**: The pollen tube typically grows down the style towards the ovary, reaching the micropilar end of the embryo sac where the egg is located.

6. **Process of Gamete Transfer**: The process of the pollen tube reaching the egg cell through the micropilar end is known as **porogamy**.

7. **Conclusion**: Therefore, the process whereby the male gametes are brought to the egg by a pollen tube is called **porogamy**.

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