The Question is from neet-botany sexual-reproduction-in-flowering-plants , and it was created by the author D VINOD

Question

Select the incorrect statement w.r.t. pollen  grains.

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Structure of Pollen Grain
	**Related Topics**: Palynology, Plant Reproduction, Pollination
	**Prerequisites**: Basic plant biology, Cell wall composition
## SOLUTION PATHWAY
**Given Information**:
	Multiple statements regarding pollen grains.
	Need to identify the incorrect statement.
**Method & Steps**:
	1. Analyze each statement based on the structure and function of pollen grains.
	2. Identify the statement that contradicts established knowledge about pollen grain components.
	3. Confirm the correct composition of the exine and intine layers.

## OPTION ANALYSIS
[A] :x: **The exine is made up of pectin and cellulose.**: This statement is incorrect. The exine, the outer layer of the pollen grain, is primarily composed of sporopollenin, a highly resistant biopolymer.  Sporopollenin makes the exine tough and resistant to degradation.
[B] ✓: **The intine is made up of cellulose and pectin.**: This statement is correct. The intine, the inner layer of the pollen grain, is made of cellulose and pectin, similar to typical plant cell walls.
[C] ✓: **Generative cell divides to form two male gametes.**: This statement is correct. The generative cell within the pollen grain undergoes mitosis to produce two male gametes that participate in fertilization.
[D] ✓: **Pollen grains are generally spherical.**: This statement is generally correct. While there can be some variations in shape, pollen grains are predominantly spherical or near-spherical.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the composition of exine and intine: Remember that the exine is made of sporopollenin for protection, while the intine is made of cellulose and pectin.
		2. Overlooking the role of the generative cell: Remember that it is crucial for double fertilization by producing two male gametes.
	**Quick Tips**:
		1.  'Exine' starts with 'E' and so does 'Extremely resistant', which helps remember the tough sporopollenin composition of the exine.
		2. 'Intine' starts with 'I' and so does 'Inner', making it easier to recall that it is the inner layer.

D VINOD · Answer

The correct Option is "The exine is made up of pectin and cellulose."

D VINOD · Answer

The intine is made up of cellulose and pectin.

D VINOD · Answer

Generative cell divides to form two male gametes.

D VINOD · Answer

Pollen grains are generally spherical.

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