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Five rowed archegonial neck occurs in...

Five rowed archegonial neck occurs in

A

Marchantia

B

Funaria

C

Porella/Madotheca

D

Riccia.

Text Solution

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The correct Answer is:
To determine which plant has a five-rowed archegonial neck, we can analyze the options provided based on the structure of the archegonium in each of the given plants. ### Step-by-Step Solution: 1. **Understanding Archegonium**: - The archegonium is the female reproductive organ found in bryophytes and pteridophytes. It is typically flask-shaped, consisting of a swollen base (venter) and a long cylindrical neck. 2. **Identifying the Structure of the Neck**: - The neck of the archegonium is made up of vertical cells known as neck cells. The number of rows of these neck cells varies among different plant species. 3. **Analyzing the Options**: - **Marchantia**: The archegonial neck has 8 rows of cells. - **Funaria**: The archegonial neck has only 1 row of cells (single-layered). - **Porella or Medotheca**: The archegonial neck has 5 rows of cells. - **Rixia**: The archegonial neck has 6 rows of cells. 4. **Conclusion**: - Based on the analysis, the plant with a five-rowed archegonial neck is **Porella or Medotheca**. Therefore, the correct answer is option **C**. ### Final Answer: The five-rowed archegonial neck occurs in **Porella or Medotheca** (Option C).
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