The Question is from neet-botany plant-growth-and-development , and it was created by the author K SURESH KUMAR

Question

In coleoptile tissue, auxin is

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
	**Primary Concept**: Auxin production and transport in plants.
	**Related Topics**: Plant hormones, apical dominance, phototropism, gravitropism, polar transport
	**Prerequisites**: Basic knowledge of plant hormones and plant anatomy.
## SOLUTION PATHWAY
**Given Information**:
	* The question concerns the location and movement of auxin in coleoptile tissue.
**Method & Steps**:
	1. Recall that auxins are plant hormones involved in growth and development.
		Reasoning: Understanding the function of auxins is key to identifying where they are produced and how they move.
	2. Recall that auxins are primarily produced in the apical meristems (growing tips) of stems and roots.
		Reasoning: This is a fundamental concept about auxin synthesis.
	3. Recall that auxins are transported basipetally (from tip to base) in shoots via polar transport, not by diffusion or osmosis.
		Reasoning: Auxin transport is an active, not passive, process.
	4. Recognize that the coleoptile is a stem structure, and thus auxin produced at its tip will move downward to influence growth.
		Reasoning: Understanding the structure and function of coleoptile helps to apply auxin transport knowledge.
	5. Evaluate the given options in light of the above understanding.
		Reasoning: Select the option that accurately describes auxin production and transport.
## OPTION ANALYSIS
[A] :x: Incorrect. Auxin is transported and is not used where it is made.
[B] :x: Incorrect. Auxin is transported via active transport, not diffusion.
[C] :x: Incorrect. Auxin is transported via active transport, not osmosis, and it moves from tip to base.
[D] ✓: Correct. Auxin is produced at the growing tips (apices) and migrates to the region of action to promote growth.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing diffusion/osmosis with active transport: Auxin moves via active transport.
		2. Forgetting that auxin is produced at the apical meristem: Auxin is not produced everywhere in the plant.
	**Quick Tips**:
		1. Remember the term 'apical dominance': Auxin produced at the apex suppresses lateral bud growth.
		2. Visualize the shoot tip as the primary source of auxin.

K SURESH KUMAR · Answer

Not transported because it is used where it is made

K SURESH KUMAR · Answer

Transported by diffusion

K SURESH KUMAR · Answer

Transported from the base to tip by osmosis

K SURESH KUMAR · Answer

The correct Option is "Produced by growing apices of stem, which migrate to the region of its action"

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