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

Question

Pick out the correct statements.
i. Cytokinins especially help in delaying senescence.
ii. Auxins are involved in regulating apical dominance.
iii. Ethylene is especially useful in enhancing seed germination.
iv. Gibberellins are responsible for immature falling of leaves.

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
	**Primary Concept**: Plant Hormones and their functions
	**Related Topics**: Plant Physiology, Growth and Development
	**Prerequisites**: Basic knowledge of plant hormones and their roles.
## SOLUTION PATHWAY
**Given Information**:
	Statements about the functions of different plant hormones.
	The question requires identifying the correct statements.
**Method & Steps**:
	1. Evaluate each statement individually for correctness based on knowledge of plant hormones:
		Reasoning: Recall the known functions of each hormone.
	2. Identify the correct statements.
	3. Select the option containing all the correct statements.
**Statements Analysis**:
	* **Statement i:** Cytokinins are known to delay senescence (aging) in plants. This statement is correct.
	* **Statement ii:** Auxins are indeed involved in apical dominance, where the apical bud inhibits the growth of lateral buds. This statement is correct.
	* **Statement iii:** Ethylene is involved in fruit ripening and abscission (falling of leaves/fruits), not typically in enhancing seed germination. This statement is incorrect.
	* **Statement iv:** Gibberellins promote stem elongation, seed germination, and flowering, not the falling of immature leaves. Abscission is primarily driven by ethylene. This statement is incorrect.
	4. Based on the analysis, statements i and ii are correct.
**Result**: Option D (I and II) is the correct answer.
## OPTION ANALYSIS
[A] :x: Incorrect because statement III is incorrect
[B] :x: Incorrect because statement IV is incorrect
[C] :x: Incorrect because statement III is incorrect
[D] ✓: Correct because statements I and II are correct
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the roles of different plant hormones: Students often mix up the primary functions of each hormone. To avoid this, create a table summarizing each hormone's key roles.
		2. Assuming all hormones have similar functions: Each hormone has a specific set of effects on plant growth and development. Learn each function separately.
	**Quick Tips**:
		1. Use mnemonics: For instance, “C for Cytokinin, C for Cell division and delaying cell senescence” could help remember the function of cytokinins. 
		2. Visualize: Thinking of a growing plant and how each hormone would affect it can be helpful in understanding their specific roles.

B VENKAT · Answer

I and III

B VENKAT · Answer

I and IV

B VENKAT · Answer

II and III

B VENKAT · Answer

The correct Option is "I and II"

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