Which of the following induces femaleness in plants?

Options

A. Auxin and ethylene
B. Ethanol
C. ABA
D. Gibberellin

Answer

To determine which hormone induces femaleness in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Hormones**: First, we need to look at the hormones mentioned in the options: auxin, ethylene, ethanol, abscisic acid (ABA), and gibberellin.

2. **Understand the Role of Each Hormone**:
- **Auxin**: This hormone is primarily responsible for cell elongation and growth. It plays a role in various developmental processes in plants.
- **Ethylene**: Known as a fruit ripening hormone, ethylene also influences the sex expression in plants, promoting femaleness.
- **Ethanol**: This is not a plant hormone and does not have a known role in inducing femaleness.
- **Abscisic Acid (ABA)**: This hormone is mainly involved in stress responses and does not induce femaleness.
- **Gibberellin**: This hormone is primarily involved in promoting stem elongation, seed germination, and flowering, but not specifically in inducing femaleness.

3. **Focus on Auxin and Ethylene**: From the analysis, we see that both auxin and ethylene are linked to the induction of femaleness in plants. Ethylene directly promotes femaleness, while auxin can increase the synthesis of ethylene, thus indirectly contributing to femaleness.

4. **Conclusion**: Based on the roles of these hormones, we conclude that both auxin and ethylene are responsible for inducing femaleness in plants.

### Final Answer:
The hormones that induce femaleness in plants are **auxin and ethylene**.

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