Select the incorrect statements.

Options

A. ABA acts as antagonist to GAs
B. Ethylene can act both as a promotor and an inhibitor of growth activity.
C. Auxin and ethylene promotes apical dominance.
D. ABA promotes seed germination

Answer

To solve the question, we need to analyze each statement related to plant hormones and identify the incorrect one.

### Step-by-step Solution:

1. **Understanding ABA (Abscisic Acid)**:
- ABA is known as an inhibitory plant hormone.
- It is responsible for causing dormancy in seeds and preventing germination.
- Therefore, any statement claiming that ABA promotes seed germination would be incorrect.

**Hint**: Recall the role of ABA in seed dormancy and germination.

2. **Understanding GA (Gibberellins)**:
- Gibberellins are known as promotory plant hormones.
- They promote seed germination and growth.
- This statement is correct as it aligns with the known functions of GA.

**Hint**: Think about how gibberellins are used in agriculture to enhance growth.

3. **Understanding Ethylene**:
- Ethylene is a unique hormone that can act both as a promoter and an inhibitor.
- It promotes fruit ripening and root growth but also promotes senescence (aging).
- This dual role is well-documented, making this statement correct.

**Hint**: Consider the role of ethylene in fruit ripening and aging processes.

4. **Understanding Auxin and Ethylene in Apical Dominance**:
- Auxin is primarily responsible for apical dominance, where the main stem grows more vigorously than lateral buds.
- Ethylene also plays a role in this process.
- Therefore, this statement is correct.

**Hint**: Remember how apical dominance affects plant growth patterns.

5. **Identifying the Incorrect Statement**:
- The fourth statement claims that "ABA promotes seed germination."
- Based on our understanding of ABA, this statement is incorrect because ABA actually inhibits seed germination.

**Final Answer**: The incorrect statement is option number 4: "ABA promotes seed germination."

### Summary:
- The statements about ABA, GA, ethylene, and auxin were analyzed.
- The incorrect statement was identified as the one regarding ABA promoting seed germination.