LIFE SCIENCE

Detailed explanation-1: -In reality, regeneration is a ubiquitous process in all multicellular organisms. It ranges from response to wounding by healing the wounded tissue to whole body neoforming (remaking of the new body). In a larger context, regeneration is one facet of two reproduction schemes that dominate the evolution of life.

Detailed explanation-2: -Advantages. Multicellularity allows an organism to exceed the size limits normally imposed by diffusion: single cells with increased size have a decreased surface-to-volume ratio and have difficulty absorbing sufficient nutrients and transporting them throughout the cell.

Detailed explanation-3: -In a complex organism, tissues and specialized cells make up different organs and perform several functions in their body. So a simple regeneration cannot give rise to the complex organism due to its highly specialized features. The organs in a complex organism are organized at different levels.

Detailed explanation-4: -In multicellular cells, due to specialization, regeneration ability is very less. In order to carry out specific activities, sometimes specialized cells may lose their vital functions, e.g. RBCs, sieve tube cells.