Spirogyra has a

Options

A. Haplontic life cycle
B. Diplontic life cycle
C. Haplobiontic life cycle
D. Diplobiontic life cycle

Explanation

To determine the type of life cycle Spirogyra has, we can follow these steps:

### Step 1: Identify Spirogyra
Spirogyra is a type of green algae, specifically known for its filamentous structure.

**Hint:** Remember that Spirogyra is classified under green algae.

### Step 2: Understand Reproduction in Spirogyra
Spirogyra primarily reproduces asexually through fragmentation, which is a common method in filamentous algae.

**Hint:** Asexual reproduction means that the organism can reproduce without the fusion of gametes.

### Step 3: Explore Sexual Reproduction
In addition to asexual reproduction, Spirogyra can also reproduce sexually. During sexual reproduction, gametes are formed from the haploid plant body.

**Hint:** Look for the role of gametes in sexual reproduction.

### Step 4: Determine the Type of Life Cycle
In Spirogyra, the dominant phase of the life cycle is the haploid phase. After the fusion of gametes, a diploid zygote is formed, which eventually undergoes meiosis to produce haploid spores. This indicates that Spirogyra has a haplontic life cycle, where the haploid stage is the most prominent.

**Hint:** Focus on which phase (haploid or diploid) is dominant in the life cycle.

### Conclusion
Based on the above steps, we conclude that Spirogyra has a **haplontic life cycle**.

**Final Answer:** Spirogyra has a haplontic life cycle.