The Question is from neet-botany plant-kingdom gymnosperm, and it was created by the author NISHANTH

Question

Given below are two statements : One labelled as Assertion A and the other labelled as Reason R :
Assertion A : In **Pinus**, pollen grains are released from the microsporangium and carried by air currents.
Reason R : Air currents carry the pollen grains to the **micropyle** of the **ovules** where the male gametes are discharged and pollen tube is formed.
In the light of the above statements, choose the correct answer from the options given below :

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Pollination in Gymnosperms (specifically Pinus)
	**Related Topics**: Plant Reproduction, Anemophily, Fertilization in Plants
	**Prerequisites**: Basic understanding of plant reproductive structures and pollination mechanisms.
## SOLUTION PATHWAY
**Given Information**:
	Assertion A: Pollen grains in Pinus are released from the microsporangium and carried by air currents.
	Reason R: Air currents carry the pollen grains to the micropyle of the ovules where male gametes are discharged and the pollen tube is formed.
**Method & Steps**:
	1. **Analyze Assertion A**: Pinus is a gymnosperm, and it is primarily wind-pollinated (anemophily).  Pollen grains are produced in microsporangia and dispersed by wind. This statement is accurate.
	2. **Analyze Reason R**: While pollen grains are carried by air currents, they do not directly land on the micropyle. In Pinus, pollen grains land on a sticky fluid secreted by the ovule called the **pollination drop**. The pollination drop retracts, carrying the pollen grains into the pollen chamber.  The pollen tube then grows towards the archegonia (containing the female gamete), where the male gametes are released.  Reason R incorrectly states that pollen grains land directly on the micropyle.
	3. **Evaluate the relationship between A and R**: Assertion A is correct. Reason R is incorrect.  Therefore, the correct option is 'A is true but R is false'.
## OPTION ANALYSIS
[A] :x: Both A and R are true and R is the correct explanation of A: Incorrect because R is false.
[B] :x: Both A and R are true but R is NOT the correct explanation of A: Incorrect because R is false.
[C] ✓: A is true but R is false: Correct because A accurately describes pollen dispersal in Pinus, while R provides an inaccurate description of pollen grain destination and subsequent events.
[D] :x: A is false but R is true: Incorrect because A is true and R is false.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the landing site of pollen grains in gymnosperms: Pollen grains do not directly land on the micropyle in Pinus.
		2. Misunderstanding the role of the pollination drop:  The pollination drop plays a crucial role in capturing and transporting pollen grains.
	**Quick Tips**:
		1. Remember that gymnosperms like Pinus are primarily wind-pollinated.
		2. Visualize the pollination process in Pinus, including the pollen drop and pollen chamber.

NISHANTH · Answer

Both A and R are true and R is the correct explanation of A

NISHANTH · Answer

Both A and R are true but R is NOT the correct explanation of A

NISHANTH · Answer

The correct Option is "A is true but R is false"

NISHANTH · Answer

A is false but R is true

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