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

Question

Which of the following characteristic does not occur in Pinus?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
	**Primary Concept**: Gymnosperm Characteristics
	**Related Topics**: Plant Reproduction, Seed Plants, Evolution of Plants
	**Prerequisites**: Basic plant biology, Difference between gymnosperms and other plant groups
## SOLUTION PATHWAY
**Given Information**:
	Characteristics to evaluate for presence/absence in *Pinus*.
**Method & Steps**:
	1. Recall the defining characteristics of *Pinus* (a gymnosperm).
		Reasoning: *Pinus* belongs to the gymnosperms, which have specific traits related to reproduction and morphology.
	2. Analyze each option against these characteristics.
		Working: 
			A. Needle-like leaves: Present in *Pinus*.
			B. Cones: Present in *Pinus* (used for reproduction).
			C. Seeds: Present in *Pinus* (a key characteristic of gymnosperms).
			D. Motile sperms: Absent in *Pinus*. Gymnosperms, including pines, have non-motile sperm delivered via pollen tubes.
		Key Point: The evolution of pollen tubes and non-motile sperm was a significant step in plant adaptation to drier environments.
	3. Identify the characteristic that is NOT present.
		Result: Motile sperms (Option D)
		Verification: Gymnosperms and angiosperms have evolved non-motile sperm carried by pollen tubes, unlike more primitive plants like ferns and mosses.
 ## OPTION ANALYSIS
[A] :x: Needle-like leaves are a characteristic feature of *Pinus* and many other conifers.  They are adaptations to reduce water loss.
[B] :x: *Pinus* reproduces using cones, which bear the reproductive structures. Male cones produce pollen, and female cones bear ovules.
[C] :x: *Pinus* produces seeds, a defining characteristic of gymnosperms ('naked seeds'). The seeds are not enclosed within a fruit.
[D] ✓: *Pinus* does *not* have motile sperms.  The sperm are non-motile and are transported to the egg via a pollen tube. This is a key difference from more primitive plants like ferns and mosses, which have motile sperm that require water for fertilization.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing gymnosperms with other plant groups: Clearly understand the key features that distinguish gymnosperms (like *Pinus*) from other groups like angiosperms, ferns, and mosses.
		2.  Misunderstanding seed plant reproduction:  Recognize that the evolution of pollen and non-motile sperm allowed seed plants to reproduce effectively in drier environments without the need for free-standing water for fertilization.
	**Quick Tips**:
		1. Remember 'gymnosperm' means 'naked seed', referring to the unenclosed nature of their seeds.
		2. Associate *Pinus* with cones, needle-like leaves, and non-motile sperm delivered by pollen tubes.

D VINOD · Answer

Needle-like leaves

D VINOD · Answer

Cones

D VINOD · Answer

Seeds

D VINOD · Answer

The correct Option is "Motile sperms"

NEET Botany Plant Kingdom Gymnosperm MCQs

Select Topic

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

NEET Subjects

Our Bots

Company