The Question is from neet-botany sexual-reproduction-in-flowering-plants , and it was created by the author B VENKAT

Question

Following double fertilization in angiosperms, the endosperm develops from the _____, which is _____.

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Double fertilization and endosperm development in angiosperms
 **Related Topics**: Embryo sac structure, fertilization process, triploid endosperm
 **Prerequisites**: Basic understanding of plant reproduction and ploidy
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the origin and ploidy of the structure that develops into the endosperm after double fertilization in angiosperms.
  [Important conditions]: The context is post-double fertilization.
**Method & Steps**:
 1. Identify the structure:
  Reasoning: The endosperm develops from the primary endosperm cell (PEC).
  Formula/Rule: N/A
 2. Determine the ploidy:
  Reasoning: The PEC is formed by the fusion of a sperm nucleus (n) with two polar nuclei (2n), resulting in a triploid (3n) cell.
  Formula/Rule: n + 2n = 3n
  Result: The endosperm develops from the primary endosperm cell, which is triploid.
  Verification: This is consistent with the accepted mechanism of endosperm development in angiosperms.
 ## OPTION ANALYSIS
A :x: zygote; diploid - The zygote develops into the embryo, not the endosperm.
B ✓: primary endosperm cell; triploid - Correctly identifies the origin and ploidy of the endosperm precursor.
C :x: synergid; haploid - Synergids are haploid but do not develop into the endosperm.
D :x: antipodal cell; haploid - Antipodal cells are haploid but do not develop into the endosperm.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the roles of the zygote and primary endosperm cell: The zygote forms the embryo, while the primary endosperm cell forms the endosperm.
  2.Incorrectly determining the ploidy of the primary endosperm cell: Remember the fusion of one sperm with two polar nuclei.
 **Quick Tips**:
  1.Remember the key products of double fertilization: zygote (2n) and primary endosperm cell (3n).
  2.Use diagrams to visualize the process of double fertilization and subsequent development.

B VENKAT · Answer

zygote; diploid

B VENKAT · Answer

The correct Option is "primary endosperm cell; triploid"

B VENKAT · Answer

synergid; haploid

B VENKAT · Answer

antipodal cell; haploid

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