Asexual reproduction in most brown algae is by zoospores , these zoospores are

Options

A. Biflagellate : Pear-shaped : Unequal flagella
B. Triflagellate : Pear-shaped : Equal flagella
C. Biflagellate : Spiral-shaped : Unequal flagella
D. Biflagellate : Oval-shaped : Equal flagellate

Answer

To answer the question regarding the characteristics of zoospores in brown algae, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Type of Reproduction**:
- Brown algae reproduce asexually through zoospores. This is the first key point to understand.

2. **Understand the Characteristics of Zoospores**:
- Zoospores are motile spores that can swim due to the presence of flagella. This is important in understanding their structure.

3. **Determine the Structure of Zoospores**:
- In brown algae, zoospores are characterized by having two flagella (biplagellated). This means they possess two whip-like structures that aid in movement.

4. **Shape of the Zoospores**:
- The shape of the zoospores in brown algae is typically described as pear-shaped. This is a distinctive feature that helps in identifying them.

5. **Flagella Length**:
- The two flagella in brown algae's zoospores are unequal in length. This characteristic is crucial for their classification.

6. **Select the Correct Option**:
- Based on the above characteristics, we can analyze the given options:
- Option 1: biplagellated, pear-shaped, unequal flagella (Correct)
- Option 2: triplagellated, pear-shaped, equal flagella (Incorrect)
- Option 3: biplagellated, spiral-shaped, unequal flagella (Incorrect)
- Option 4: biplagellated, oval-shaped, equal flagella (Incorrect)
- Therefore, the correct answer is **Option 1**: biplagellated, pear-shaped, unequal flagella.

### Final Answer:
The zoospores in brown algae are **biplagellated, pear-shaped, and have unequal flagella**.

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