Identify the wrong combination

Options

A. Dryopteris-Rhizome
B. Cycas-Coralloid roots
C. Volvox-Colonial form
D. Marchantia-Pseudoelaters.

Answer

To identify the wrong combination from the given options, we will analyze each combination step by step.

### Step-by-Step Solution:

1. **Dryotaris and Rhizome**:
- Dryotaris is a pteridophyte, which is a vascular plant.
- Pteridophytes have well-differentiated leaves, stems, and roots.
- They possess rhizomes, which are modified stems that are typically sub-erect and can be 20 to 25 centimeters long.
- Rhizomes serve as storage organs for food.
- **Conclusion**: This combination is correct.

2. **Cycles and Coralloid Roots**:
- Cycas (often referred to as cycles) is a type of gymnosperm.
- It is known to have coralloid roots.
- Coralloid roots are specialized roots that facilitate nitrogen fixation through a symbiotic relationship with cyanobacteria.
- **Conclusion**: This combination is also correct.

3. **Volvox and Colonial Form**:
- Volvox is a genus of green algae that belongs to the class Chlorophyta.
- It is known for its colonial form, where individual cells form a spherical colony.
- **Conclusion**: This combination is correct.

4. **Marchantia and Pseudolaterals**:
- Marchantia is a type of bryophyte (liverwort).
- The sporophyte of Marchantia contains a capsule that produces spores.
- The capsule has coiled thickenings known as elaters, which help in spore dispersal.
- True elaters are present in Marchantia, while pseudolaterals are a feature of hornworts, not liverworts.
- **Conclusion**: This combination is incorrect.

### Final Answer:
The wrong combination is **Marchantia and Pseudolaterals**.

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