Who observed pollen tube in portulaca for the first time

Options

A. S.G. Nawaschim
B. Guignard
C. Strasburger
D. G.B. Amici

Answer

To find out who observed the pollen tube in Portulaca for the first time, we can follow these steps:

### Step 1: Identify the Scientists
We need to look at the scientists mentioned in the video transcript and their contributions to the study of pollen tubes and fertilization in plants. The scientists mentioned are S. G. Nawaschim, Guignard, Strasburger, and G.B.M.E.C.

### Step 2: Analyze Contributions
- **S. G. Nawaschim**: Known for discovering the triple fusion system in plants.
- **Guignard**: Recognized for his work on double fertilization in angiosperms.
- **Strasburger**: Focused on nuclear division in plant cells.
- **G.B.M.E.C.**: Noted for his research on how pollen tubes grow and their journey through the stigma and style to reach the embryo sac.

### Step 3: Focus on Pollen Tube Observation
From the contributions listed, we need to focus specifically on who studied the growth of the pollen tube in Portulaca. G.B.M.E.C. is the scientist who studied how pollen tubes grow and travel through the plant.

### Step 4: Conclusion
Based on the information provided, G.B.M.E.C. is the scientist who observed the pollen tube in Portulaca for the first time.

### Final Answer
**G.B.M.E.C. observed the pollen tube in Portulaca for the first time.**

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