The Question is from neet-botany plant-kingdom pteridophytes, and it was created by the author Mr. NARESH KUMAR K

Question

The dominant phase in the life cycle of a pteridophyte is:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Alternation of Generations in Pteridophytes
 **Related Topics**: Gametophyte, Sporophyte, Spores, Ferns, Life Cycle
 **Prerequisites**: Basic understanding of plant life cycles and terminology.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the dominant phase in the life cycle of a pteridophyte (a type of fern).
  [Important conditions]: Pteridophytes exhibit alternation of generations.
**Method & Steps**:
 1. Understand Alternation of Generations:
  Reasoning: Pteridophytes, like other plants, have a life cycle that alternates between a haploid gametophyte generation and a diploid sporophyte generation.
  Formula/Rule:  None directly applicable, but understanding the concept of haploid (n) and diploid (2n) is crucial.
 2. Identify the Dominant Phase:
  Working: In pteridophytes, the sporophyte (diploid, 2n) is the larger, more conspicuous, and longer-lived phase. The gametophyte (haploid, n) is relatively small and short-lived.
  Key Point: The sporophyte is independent and photosynthetic, while the gametophyte is often dependent on external sources for nutrition.
 3. Final Step:
  Result: The dominant phase in the life cycle of a pteridophyte is the sporophyte.
  Verification: This is a well-established fact in botany.  The large, leafy fern plant we commonly see is the sporophyte.
 ## OPTION ANALYSIS
A :x: Gametophyte is the smaller, less dominant phase in pteridophytes.
B ✓: Sporophyte is the dominant, independent, photosynthetic phase.
C :x: Prothallus is another name for the gametophyte, which is not the dominant phase.
D :x: Capsule refers to the structure containing spores, a part of the sporophyte but not the dominant phase itself.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing gametophyte and sporophyte: Remembering that the sporophyte is the larger, independent phase is key.
  2.Focusing on the visible part only:  While the sporophyte is easily visible, understanding the full life cycle is necessary to answer correctly.
 **Quick Tips**:
  1.Remember that ferns (pteridophytes) are the dominant sporophyte generation.
  2.Visualize the fern plant – that's the sporophyte.

Mr. NARESH KUMAR K · Answer

Gametophyte

Mr. NARESH KUMAR K · Answer

The correct Option is "Sporophyte"

Mr. NARESH KUMAR K · Answer

Prothallus

Mr. NARESH KUMAR K · Answer

Capsule

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