The Question is from neet-botany sexual-reproduction-in-flowering-plants , and it was created by the author Mr. NARESH KUMAR K

Question

Pollen grains are well preserved as fossils because of the presence of

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Biological preservation
	**Related Topics**: Cell wall structure, pollen morphology, fossilization
	**Prerequisites**: Basic knowledge of cell biology, pollen structure
## SOLUTION PATHWAY
**Given Information**:
	- The question asks about the reason for pollen grain preservation in fossils
	- Options list various cell wall components
**Method & Steps**:
	1. Identify the component known for its resistance to degradation
		Reasoning: Sporopollenin is a highly resistant polymer
		Formula/Rule: N/A
	2. Select the option that matches the resistant component
		Working: Sporopollenin is known for its resistance to degradation and is a major component of the pollen grain exine
		Key Point: Cellulose and pectin are more easily degraded
	3. Final step
		Result: Sporopollenin (A) is the correct answer
		Verification: Knowledge of plant cell wall components and their roles.
## OPTION ANALYSIS
[A] ✓: Sporopollenin is a very resistant biopolymer found in pollen walls, enabling their preservation.
[B] :x: Cellulose is a major component of plant cell walls but not the main reason for pollen preservation.
[C] :x: Pectin is a component of the plant cell wall but is not resistant enough for fossilization.
[D] :x: Option B and C are incorrect.
## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing different cell wall components: Cellulose and pectin are not as resistant as sporopollenin.
		2.[Error 2]: Assuming all cell wall components provide the same level of preservation: They have different chemical properties and degradation rates.
	**Quick Tips**:
		1.[Helpful shortcut]: Remember that 'sporopollenin' sounds like 'spore' which are often well preserved.
		2.[Memory aid]: Associate sporopollenin with the 'tough' outer layer of pollen.

Mr. NARESH KUMAR K · Answer

The correct Option is "Sporopollenin"

Mr. NARESH KUMAR K · Answer

Cellulose

Mr. NARESH KUMAR K · Answer

Pectin

Mr. NARESH KUMAR K · Answer

Both (2) and (3)

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