Cytokinin was first discovered by

Options

A. Skoog and Miller
B. Boyer
C. Benson and Calvin
D. Went

Answer

To solve the question regarding who first discovered cytokinin, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks who first discovered cytokinin, a type of plant growth hormone.

2. **Identify the Options**: The options given are:
- A) Skoog and Miller
- B) Boyer
- C) Benson and Calvin
- D) Wendt

3. **Recall Relevant Information**: Cytokinins are known for their role in promoting cell division in plants. It is important to know the contributions of the scientists listed in the options.

4. **Analyze Each Option**:
- **Skoog and Miller**: They are known for their work in plant hormones and specifically for the discovery of cytokinin in 1955, which they named kinetin.
- **Boyer**: He is known for his contributions to biotechnology, not specifically related to cytokinin.
- **Benson and Calvin**: They are renowned for their work on the Calvin cycle in photosynthesis, not related to cytokinin.
- **Wendt**: He is credited with the discovery of auxins, another class of plant hormones.

5. **Select the Correct Answer**: Based on the analysis, the correct answer is A) Skoog and Miller, as they were the first to discover cytokinin.

### Final Answer:
Cytokinin was first discovered by **Skoog and Miller**.

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