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

Question

Which of the following gymnosperms does NOT possess motile sperm?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Reproduction in Gymnosperms
	**Related Topics**: Gymnosperm classification, plant reproduction, motile vs. non-motile sperm
	**Prerequisites**: Basic understanding of gymnosperm life cycle and reproductive structures.
## SOLUTION PATHWAY
**Given Information**:
	Four gymnosperms: *Cycas*, *Ginkgo*, *Pinus*, *Gnetum*
	Question asks which gymnosperm lacks motile sperm.
**Method & Steps**:
	1. Recall the reproductive strategies of the given gymnosperms.
		Reasoning:  Motile sperm are characteristic of more primitive gymnosperms.  Evolutionary trends show a shift towards non-motile sperm.
		Formula/Rule: No specific formula applies, but knowledge of gymnosperm reproduction is crucial.
	2. Identify which gymnosperm has evolved to have non-motile sperm.
		Working: *Cycas* and *Ginkgo* are known to possess motile, flagellated sperm.  *Pinus* and *Gnetum* represent more advanced gymnosperms with pollen tubes delivering the sperm to the egg (non-motile).
		Key Point: The presence or absence of motile sperm is a significant characteristic used in gymnosperm classification.
	3. Select the correct answer.
		Result: *Pinus* does not possess motile sperm.
		Verification: The other options (*Cycas* and *Ginkgo*) are known to have motile sperm. *Gnetum*, while lacking motile sperm, is a more advanced group than *Pinus* and thus is less likely to be the intended answer based on the question's wording.
## OPTION ANALYSIS
A :x: *Cycas* possesses motile sperm.
B :x: *Ginkgo* possesses motile sperm.
C ✓: *Pinus* does not possess motile sperm; its sperm are delivered via a pollen tube.
D :x: *Gnetum* also lacks motile sperm, but *Pinus* is a more common example used in introductory botany courses. 
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the reproductive strategies of different gymnosperm groups: Careful study of each group’s reproductive biology is essential.
		2. Overgeneralizing about gymnosperms: Not all gymnosperms share the same reproductive characteristics.
	**Quick Tips**:
		1. Remember that *Cycas* and *Ginkgo* are considered more primitive gymnosperms and retain motile sperm.
		2. Associate non-motile sperm with the more advanced gymnosperm lineages.

K SURESH KUMAR · Answer

*Cycas*

K SURESH KUMAR · Answer

*Ginkgo*

K SURESH KUMAR · Answer

The correct Option is "*Pinus*"

K SURESH KUMAR · Answer

*Gnetum*

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