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Q.

The significant contributions of equational division are all except

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a

Restores nucleo-cytoplasmic ratio

b

Increases genetic variability, important for evolution

c

 Responsible for growth of multicellular organism

d

Helps in repair and regeneration process

answer is B.

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Detailed Solution

The significant contributions of equational division (mitotic division) include:

  • Maintenance of chromosome number from one generation to the next
  • Genetic stability (all daughter cells receive identical sets of chromosomes)
  • Growth and development of multicellular organisms
  • Regeneration and repair of tissues

All except:

  • Introduction of genetic variation

Mitotic (equational) division does not produce genetic variation; it preserves genetic identity. Introduction of genetic variation is mainly a contribution of reductional division (meiosis), not equational (mitotic) division.

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