Eplain briefly the following terms with suitable examples : antheridium

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Antheridium**: Antheridium is a multicellular, jacketed male sex organ found in certain groups of plants, specifically bryophytes and pteridophytes. It plays a crucial role in the reproductive process of these plants.

2. **Structure**: The antheridium is composed of a protective outer layer (the jacket) that encases the reproductive cells. This structure helps protect the developing gametes from environmental factors.

3. **Function**: The primary function of the antheridium is to produce male gametes, known as sperm or antherozoids. These gametes are typically flagellated, meaning they have tails that allow them to swim through water to reach the female gametes for fertilization.

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