The Question is from neet-zoology , and it was created by the author Mr. BALACHANDRA.N

Question

Which of the following is not a case of epimorphosis?

Mr. BALACHANDRA.N · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
**Primary Concept**: Epimorphosis
**Related Topics**: Regeneration, Gametogenesis
**Prerequisites**: Understanding of epimorphosis and its distinction from other developmental processes.
## SOLUTION PATHWAY
**Given Information**:
*   The question asks for the option that is NOT an example of epimorphosis.
*   Epimorphosis is a type of regeneration that involves dedifferentiation of cells and the formation of a blastema.
**Method & Steps**:
1.  Understand the definition of epimorphosis: This is a type of regeneration where lost body parts are replaced through the formation of a blastema, which is a mass of undifferentiated cells. These cells then proliferate and differentiate to reform the lost part.
Reasoning: Based on the definition, we need to determine which given options do not involve blastema formation.
2. Examine each option:
A. Formation of sperms from small clumps of cells: This is gametogenesis, a process of cell differentiation during sexual reproduction and not regeneration. It doesn't involve dedifferentiation and blastema formation, so it is not epimorphosis.
B. Regeneration of tail in a lizard: Lizards regenerate tails through epimorphosis, involving the formation of a blastema.
C. Replacement of several arms in starfish: Starfish can regenerate arms through epimorphosis, involving the formation of a blastema.
D. Replacement of limbs in salamander: Salamanders regenerate limbs through epimorphosis, involving the formation of a blastema.
3. Identify the option that is not epimorphosis:  Option A does not involve dedifferentiation and blastema formation, hence it's not epimorphosis.
Result: Option A is not an example of epimorphosis.
Verification: The other options (B, C, and D) all involve regeneration through blastema formation, making them instances of epimorphosis.
## OPTION ANALYSIS
[A] ✓: Formation of sperms is a form of cell differentiation (gametogenesis) and not regeneration via blastema formation, thus it is not epimorphosis. 
[B] :x: Tail regeneration in lizards is a classic example of epimorphosis involving blastema formation.
[C] :x: Starfish arm regeneration involves epimorphosis with blastema formation.
[D] :x: Salamander limb regeneration is an example of epimorphosis involving blastema formation.
## LEARNING AIDS
**Common Mistakes**:
1. Confusing regeneration with other types of cell differentiation: Gametogenesis is a differentiation process and not a form of regeneration.
How to avoid: Understand that regeneration requires replacement of lost tissue, often involving blastema formation and dedifferentiation.
2. Misunderstanding the different types of regeneration: Epimorphosis is a specific type of regeneration involving blastema formation.
How to avoid: Clearly define and differentiate the different types of regeneration.
**Quick Tips**:
1. Focus on the blastema: The key feature of epimorphosis is the blastema formation.
2. Remember examples: Consider the examples of lizard tail regeneration, starfish arm regeneration, and salamander limb regeneration as classic cases of epimorphosis.

Mr. BALACHANDRA.N · Answer

The correct Option is "Formation of sperms from small clumps of cells"

Mr. BALACHANDRA.N · Answer

Regeneration of tail in a lizard

Mr. BALACHANDRA.N · Answer

Replacement of several arm in starfish

Mr. BALACHANDRA.N · Answer

Replacement of limb in salamander

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