EVERYDAY SCIENCE

Detailed explanation-1: -Certain specialised cells lose power of division. A well marked capacity of regeneration is present. The capacity of regeneration decreases with increasing specialisation. The cells has the same role for itself and the organism.

Detailed explanation-2: -Regeneration occurs in fully differentiated multicellular/complex organisms but only to regenerate a part of the organism. Higher multicellular organisms are too complex for asexual reproduction by these processes.

Detailed explanation-3: -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-4: -Cell specializations make it possible to express fewer genes in individual cells of multicellular organisms, thus protecting genes from the damage of mutagens.

Detailed explanation-5: -(b) Complex multicellular organisms cannot give rise to new organism because the tissue and specialised cell make up the organs in the body. Due to this high degree of specialisation, multicellular organisms cannot reproduce by regeneration of a part of some tissue.