Before You Begin
Question #47547
The Question
Consider the mechanisms of embryogeny and resource allocation in Pinus (a gymnosperm) compared to a typical angiosperm. Which of the following statements is INCORRECT regarding their embryonic development and nutritive tissues?
Options
- A.
In Pinus, cleavage polyembryony generates multiple embryos that draw nutrition from a haploid tissue formed prior to fertilization.
- B.
In angiosperms, the division of the generative cell ensures double fertilization, leading to the formation of a triploid nutritive tissue post-fertilization.
- C.
The endosperm of Pinus is a post-fertilization product of triple fusion that must rapidly synthesize nutrients to support the multiple embryos formed via zygotic cleavage.
- D.
Despite the formation of multiple embryos during early development in Pinus, ultimate seed maturation typically yields a single viable embryo due to competitive resource allocation.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Microspore Mother Cell|Meiosis|Colchicine|Gymnosperm Endosperm
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often conflate the term 'endosperm' across all seed plants, assuming it always arises from double fertilization/triple fusion (as heavily emphasized in the Angiosperm reproduction chapter of NCERT).
The trap exploits this by mixing the valid concept of Pinus cleavage polyembryony with the invalid, angiosperm-specific origin of its endosperm.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Gymnosperm Endosperm Identity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |