Pleurilocular sporangia in Ectocarpus contain ……………… which are formed without meiosis .

Answer

**Step-by-Step Solution:**

1. **Understanding Plurilocular Sporangia**: Plurilocular sporangia are specialized structures found in certain algae, including Ectocarpus. They are responsible for producing spores.

2. **Identifying the Contents**: The contents of plurilocular sporangia are specific types of spores. In the case of Ectocarpus, these spores are known as zoospores.

3. **Formation of Zoospores**: Zoospores are formed asexually and do not involve meiosis. Instead, they are produced through a process where the protoplasm of the parent cell divides to form new individuals.

4. **Characteristics of Zoospores**: Each zoospore typically has two flagella, which make them motile. This motility is important for their dispersal in the aquatic environment.

5. **Release of Zoospores**: As the plurilocular sporangia mature, they eventually burst, releasing the zoospores into the surrounding environment, where they can develop into new organisms.

6. **Conclusion**: Therefore, the correct answer to the question is that plurilocular sporangia in Ectocarpus contain **zoospores**, which are formed without meiosis.

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