One of the following is a heterotrophic bryophyte?

Options

A. Cryptothallus
B. Riccia
C. Dawsonia
D. Sphaerocarpus

Answer

To determine which of the given options is a heterotrophic bryophyte, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Heterotrophy**:
- Heterotrophic organisms cannot produce their own food and must rely on other organisms for nutrients. This is in contrast to autotrophic organisms, which can produce their own food through photosynthesis.

2. **Identify the Options**:
- The options provided are:
- A) Cryptothallus
- B) Zika
- C) Dorsonia
- D) Sapharocarpus

3. **Analyze Each Option**:
- **Cryptothallus**: This organism is a type of liverwort that lacks chlorophyll, indicating that it cannot perform photosynthesis and is therefore heterotrophic.
- **Zika**: This is a moss that is green in color, suggesting it contains chlorophyll and can photosynthesize, making it autotrophic.
- **Dorsonia**: Similar to Zika, Dorsonia is also a moss with chlorophyll, indicating it is autotrophic.
- **Sapharocarpus**: This is a bottle liverwort that also has chlorophyll and can perform photosynthesis, categorizing it as autotrophic.

4. **Determine the Correct Answer**:
- Based on the analysis, the only organism that is heterotrophic (lacks chlorophyll and depends on other organisms for food) is **Cryptothallus**.

5. **Conclusion**:
- The correct answer to the question "One of the following is a heterotrophic bryophyte?" is **A) Cryptothallus**.