A very tall plant with fewer lateral branches will have auxin: cytokinin ratio of

Options

A. `2:1 `
B. `1:1 `
C. `1:2 `
D. `3:4`

Answer

To determine the auxin to cytokinin ratio in a very tall plant with fewer lateral branches, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Plant Hormones**:
- Auxins and cytokinins are both plant hormones that promote growth but have different effects. Auxins primarily promote vertical growth (elongation), while cytokinins promote lateral growth (branching).

2. **Analyzing the Plant's Characteristics**:
- The question states that the plant is very tall and has fewer lateral branches. This indicates that the plant is experiencing more vertical growth than lateral growth.

3. **Relating Growth Patterns to Hormone Ratios**:
- Since auxins promote vertical growth, a high concentration of auxins would lead to increased height. Conversely, a low concentration of cytokinins would result in fewer lateral branches.

4. **Determining the Ratio**:
- Given that the plant is tall with fewer branches, we can conclude that the ratio of auxins to cytokinins is high. This means that auxins are present in greater amounts compared to cytokinins.

5. **Conclusion**:
- Therefore, the auxin to cytokinin ratio in this very tall plant with fewer lateral branches is greater than one (auxin > cytokinin).

### Final Answer:
The auxin to cytokinin ratio is greater than 1.

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