Diplontic life cycle is seen in ________.

Options

A. Funaria
B. Equisetum
C. Fucus
D. Adiantum

Answer

To solve the question regarding which organism exhibits a diplontic life cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Diplontic Life Cycle**:
- A diplontic life cycle is characterized by a dominant diploid (2N) stage. In this cycle, the organism spends most of its life in the diploid phase, and the haploid (N) phase is limited to the formation of gametes.

2. **Identifying the Organisms**:
- The options provided are:
A. Phenaria
B. Equicertum
C. Fucus
D. Adiantum

3. **Analyzing Each Option**:
- **Phenaria**: Not commonly known for a diplontic life cycle.
- **Equicertum**: Also not widely recognized for having a diplontic cycle.
- **Fucus**: This is a genus of brown algae that exhibits a diplontic life cycle. The sporophyte (2N) is the dominant stage, and it produces gametes through meiosis.
- **Adiantum**: This is a genus of ferns, which typically have an alternation of generations, including a dominant sporophyte and a gametophyte stage.

4. **Confirming Fucus as the Correct Answer**:
- In Fucus, the sporophyte is diploid (2N) and produces haploid gametes through meiosis. Upon fertilization (syngamy), a diploid zygote is formed, which develops into a new sporophyte, thus confirming the diplontic nature of its life cycle.

5. **Final Answer**:
- Based on the analysis, the correct answer to the question "Diplontic life cycle is seen in ________." is **C. Fucus**.