Question

What is the difference between regeneration and fragmentation?

Answer 1

Hint: Regeneration and fragmentation are both different types of growth processes that are predominantly found in the organisms with a simple body structure, i.e. the ones with a single cell or with a few cells only.

Complete answer:
Both regeneration and fragmentation are types of asexual reproduction.

The differences between regeneration and fragmentation are listed in the table below in a comprehensive manner:

Parameters	Regeneration	Fragmentation
Definition	Regeneration is defined as the process in which a lost part of the body of an organism is formed by cell division.	Fragmentation is defined as the process in which all the missing parts of the body of an organism are formed by cell division.
Number of Organisms formed	In this process, no new organisms are formed.	New organisms are always formed in this process.
Requirement of Fertilization	There is no need of fertilization of cells in this process.	Fertilization may or may not be needed in this process.
Organisms exhibiting the property	Regeneration is property exhibited by all organisms with a simple structure of cells and by complex structured organisms upto a certain limit.	Fragmentation is a process limited to only simple structured organisms.
Examples	Growing of a damaged tail of lizards.	Reproduction in a planaria.

Note:
The humans and other multicellular organisms do not undergo regeneration as a large number of complexity in cell arrangements is involved which does not allow for proper regeneration of cells and tissues.