The Question is from neet-botany plant-growth-and-development , and it was created by the author B VENKAT

Question

Which of the following combinations of factors is MOST LIKELY to break seed dormancy in a species exhibiting combinational dormancy?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [Option C]
## CONCEPT FRAMEWORK
	**Primary Concept**: Seed dormancy mechanisms
	**Related Topics**: Germination, environmental triggers, dormancy types
	**Prerequisites**: Understanding of seed biology and dormancy types
## SOLUTION PATHWAY
**Given Information**:
		1. Species exhibiting combinational dormancy
		2. Different environmental factors may be used to break dormancy
**Method & Steps**:
	1. Identify the nature of combinational dormancy.
		Reasoning: Combinational dormancy often requires a combination of environmental signals to trigger germination.
		Formula/Rule: Dormancy = f(Temperature, Light, Water, Chemicals)
	2. Evaluate the options based on known requirements for breaking dormancy.
		Working: 
		- Option A: High temperatures may benefit some seeds, but gibberellic acid is less common for breaking combinational dormancy.
		- Option B: Scarification helps, but high oxygen levels are not a primary factor.
		- Option C: Cold stratification (chilling) followed by light mimics natural seasonal cues, which is effective.
		- Option D: Water soaking is beneficial, but ethylene is not typically effective for combinational dormancy.
	3. Identify the most effective combination.
		Result: Cold stratification followed by exposure to light is the most common and effective method to break combinational dormancy.
		Verification: Literature supports light exposure after cold treatment as a successful method.
## OPTION ANALYSIS
[A] :x: High temperatures are not the primary factor for combinational dormancy. 
[B] :x: While scarification is helpful, the oxygen factor is not significant in this context. 
[C] ✓: Cold stratification combined with light is a well-established method to break dormancy. 
[D] :x: Water soaking is useful, but ethylene does not play a significant role in this type of dormancy. 
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing types of dormancy: Understand different dormancy mechanisms.
		2. Overlooking the role of specific environmental cues: Study how different factors interact to promote germination.
	**Quick Tips**:
		1. Remember that cold followed by light is a common cycle in nature for many seeds.
		2. Familiarize with examples of seeds that require specific dormancy-breaking conditions.

B VENKAT · Answer

Exposure to high temperatures followed by gibberellic acid application.

B VENKAT · Answer

Scarification followed by exposure to high oxygen levels.

B VENKAT · Answer

The correct Option is "Cold stratification followed by exposure to light."

B VENKAT · Answer

Soaking in water followed by exposure to ethylene.

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