Correct Option
The correct option is Dormancy or rest.
Explanation
Seed germination is the process by which a seed develops into a new plant. When seeds do not germinate immediately after being shed, they enter a state of metabolic inactivity or suspended growth. This ensures survival during adverse environmental conditions.
Option Analysis
- Dormancy or rest Dormancy or rest: Correct. Dormancy is a state of suspended growth and metabolism. It allows seeds to overcome unfavorable climatic conditions (such as extreme cold or drought) and germinate only when conditions (moisture, temperature, oxygen) become favorable. While strictly speaking, "quiescence" refers to inactivity due to external conditions and "dormancy" due to internal factors, in this context, the term covers the general state of rest and inability to germinate.
- Senescence Senescence: Incorrect. Senescence refers to the biological aging process that leads to the deterioration and eventual death of plant tissues, organs, or the entire organism. It is the final phase of development, not a temporary pause in germination.
- Bolting Bolting: Incorrect. Bolting is the phenomenon of rapid internode elongation just prior to flowering, typically seen in rosette plants like cabbage or beet. It is often induced by plant hormones (gibberellins) or environmental cues (photoperiod/temperature).
- Abscission Abscission: Incorrect. Abscission is the natural shedding or separation of plant parts, such as leaves, flowers, or fruits, from the main plant body. It is unrelated to seed germination failure.
Key Takeaway
Dormancy is a survival mechanism that suspends seed germination during unfavorable conditions, whereas senescence is the irreversible process of aging and death.