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

Question

Embryo sac of angiosperms

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: Embryo sac structure in angiosperms.
	**Related Topics**: Angiosperm reproduction, Megagametogenesis.
	**Prerequisites**: Basic understanding of plant reproduction and the structure of the embryo sac.
## SOLUTION PATHWAY
**Given Information**:
	* The question asks about the structure of the embryo sac in angiosperms.

**Method & Steps**:
	1. Recall the typical structure of the mature embryo sac: It is a 7-celled, 8-nucleate structure comprising the egg apparatus (egg cell and two synergids), central cell (with two polar nuclei), and antipodal cells (typically three).
		Reasoning: The question assesses knowledge of the cellular components within the angiosperm embryo sac.
	2. Evaluate each option against the known structure:
		A. Has 3 synergids and 2 anitpodal cells: Incorrect. Typically, there are two synergids and three antipodal cells.
		B. Has three celled egg apparatus: Correct. The egg apparatus is composed of an egg cell and two synergids, making it a three-celled structure.
		C. Is 8 celled and 7 nucleate structure: Incorrect. The embryo sac is typically 7-celled and 8-nucleate.
		D. Has three antipodal cells at micropylar end: Incorrect. Antipodal cells are at the chalazal end, not the micropylar end.
	3. Select the correct option.
		Result: Option B is the correct answer.
		Verification: The egg apparatus is a known three-celled entity within the embryo sac.
 ## OPTION ANALYSIS
[A] :x: Incorrect. The number of synergids and antipodal cells is reversed.
[B] ✓: Correct. The egg apparatus consists of the egg cell and two synergids.
[C] :x: Incorrect. The embryo sac is 7-celled and 8-nucleate, not the other way around.
[D] :x: Incorrect. The antipodal cells are located at the chalazal end, not the micropylar end.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the number of cells and nuclei in the embryo sac: Understanding that it is 7-celled and 8-nucleate is crucial.
		2. Misplacing the location of the antipodal cells: Remember that antipodals are at the chalazal end, opposite the micropylar end.
	**Quick Tips**:
		1. Visualize the structure: Draw a diagram of the embryo sac to remember the location and number of cells.
		2. Use mnemonics: Create a memory aid to remember the location of antipodal cells and the composition of the egg apparatus.

D VINOD · Answer

Has 3 synergids and 2 anitpodal cells

D VINOD · Answer

The correct Option is "Has three celled egg apparatus"

D VINOD · Answer

Is 8 celled and 7 nucleate structure

D VINOD · Answer

Has three antipodal cells at micropylar end

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