Suspension of seed germination due to endogenous factors is

Options

A. Quiescence
B. Dormancy
C. Vivipary
D. Both (1) & (2)

Answer

To solve the question regarding the suspension of seed germination due to endogenous factors, we can follow these steps:

### Step 1: Understand the Terms
- **Endogenous Factors**: These are internal factors that affect the seed's ability to germinate, such as hormonal influences.
- **Quiescence**: A state where seeds are viable but do not germinate due to external conditions (like moisture or temperature).
- **Dormancy**: A state where seeds are alive but inactive, and they cannot germinate even under favorable conditions due to internal factors.
- **Vivipary**: A condition where seeds germinate while still attached to the parent plant.

### Step 2: Analyze the Options
- **Quiescence**: This is not caused by internal factors; it is more about external conditions.
- **Dormancy**: This is indeed a suspension of germination due to internal factors, such as hormonal regulation (e.g., abscisic acid, ABA).
- **Vivipary**: This is a different phenomenon where seeds germinate while still attached to the parent plant, which does not relate to dormancy or quiescence.
- **Both 1 and 2**: This option suggests that both quiescence and dormancy are correct, but since quiescence is not an endogenous factor, this option is incorrect.

### Step 3: Identify the Correct Answer
Based on the definitions and analysis, the correct answer to the question is **Dormancy**. This is because dormancy is specifically related to the internal factors that prevent seed germination.

### Final Answer
The suspension of seed germination due to endogenous factors is **Dormancy**.

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