This is believed to have not evolved in cenozoic period `:`

Options

A. Bryophytes
B. Ferns
C. Conifers
D. Cycads.

Answer

To answer the question "This is believed to have not evolved in the Cenozoic period," we will analyze the provided options and the geological time periods mentioned in the video transcript.

### Step-by-Step Solution:

1. **Understanding Geological Time Periods**:
- The geological time scale is divided into eons, eras, periods, and epochs. The Cenozoic era is the most recent era, known for the dominance of mammals and flowering plants.

2. **Identifying the Options**:
- The options given are:
1. Bryophyte
2. Ferns
3. Conifers
4. Cycads

3. **Analyzing Each Option**:
- **Bryophytes**: These are non-vascular plants that are believed to have evolved during the Mesozoic era, not in the Cenozoic era.
- **Ferns**: Ferns are vascular plants that evolved during the Paleozoic era and continued to thrive in the Cenozoic era.
- **Conifers**: These are a group of seed-producing plants that also evolved during the Mesozoic era and are present in the Cenozoic era.
- **Cycads**: These are ancient seed plants that were prominent during the Mesozoic era and continued to exist into the Cenozoic era.

4. **Conclusion**:
- Since the Bryophyte is the only option that is believed to have not evolved during the Cenozoic era, the correct answer is **Bryophyte**.

### Final Answer:
**Bryophyte** is believed to have not evolved in the Cenozoic period.

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