In Ulothrix, meiosis takes place in

Options

A. Cells of the filament
B. Holdfast
C. Ztgote
D. Zoospores.

Explanation

To solve the question "In Ulothrix, meiosis takes place in," we need to understand the reproductive cycle of Ulothrix, a filamentous green algae. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Organism
Ulothrix is a filamentous green algae found in both marine and freshwater environments. It has a structure made up of filaments, which are chains of cells.

**Hint:** Research the general characteristics of Ulothrix to understand its structure and reproduction.

### Step 2: Identify the Reproductive Structures
In Ulothrix, reproduction can occur through both asexual and sexual means. Asexual reproduction typically involves mitosis, while sexual reproduction involves meiosis.

**Hint:** Look into the differences between asexual and sexual reproduction in algae.

### Step 3: Focus on Meiosis
Meiosis is a type of cell division that reduces the chromosome number by half and is essential for the formation of gametes. In Ulothrix, meiosis occurs specifically during the formation of the zygote.

**Hint:** Recall the process of meiosis and where it typically occurs in organisms that reproduce sexually.

### Step 4: Identify the Correct Answer
In Ulothrix, the zygote is formed when two isogametes (gametes of the same type) fuse. This zygote is where meiosis occurs, leading to the production of zoospores.

**Hint:** Consider the life cycle of Ulothrix and where meiosis fits into that cycle.

### Step 5: Conclusion
Thus, the correct answer to the question is that meiosis takes place in the zygote of Ulothrix.

**Final Answer:** In Ulothrix, meiosis takes place in the zygote.