What is the significance of cell division

During interphase, the cell grows and DNA is replicated; during the mitotic phase, the replicated DNA and cytoplasmic contents are separated and the cell divides. Key Terms somatic cell : any normal body cell of an organism that is not involved in reproduction; a cell that is not on the germline interphase : the stage in the life cycle of a cell where the cell grows and DNA is replicated mitotic phase : replicated DNA and the cytoplasmic material are divided into two identical cells.

Introduction: Cell Division and Reproduction A human, as well as every sexually-reproducing organism, begins life as a fertilized egg or zygote. After four rounds of cell division, b there are 16 cells, as seen in this SEM image. After many rounds of cell division, the individual develops into a complex, multicellular organism, as seen in this c mature sea urchin.

During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase. After many rounds of cell division, the individual develops into a complex, multicellular organism, as seen in this c mature sea urchin.

Skip to main content. Module 8: Cell Division. Search for:. We inevitably got injured from time to time. Our body can turn on emergency cell division to heal wounds. For example, our skin cells can rapidly divide to heal the loss of a protective skin layer. Some animals such as salamanders have remarkable healing abilities. Salamanders amphibians have been hailed as champions of regeneration , exhibiting a remarkable ability to regrow tissues, organs, and even whole body parts.

The cell division replenishes the lost cell, therefore to repair damaged tissue and even the whole body parts in Salamander. Cell division also plays a central role in the reproduction of multi-celled organisms.

Some primitive animals, like starfish, hydra, or flatworm, can reproduce by simply dividing into several pieces and each portion then regenerates its missing parts by cell division. Other multi-cellular organisms like humans need a special process of cell division, called Meiosis, to create sperms and eggs for reproduction. Primitive animals, such as starfish, hydra, or flatworm reproduce themselves by regular cell division.

Here the meiotic division takes place immediately before gamete formation and the haploid cells thus formed are transformed into sperm male gamete and egg female gamete.

We come across this type of meiosis in higher plants and in some thallophyta but not in animals. The life-cycles of these organisms are characterised by alternation of haploid and diploid generations i. Meiosis occurs in the sporogenous cells micro-and megaspore mother cells of the sporophyte producing haploid spores. The spores on germination form gametophytes male and female.

Cells of the gametophyte form gametes. Fusion of these gametes again leads to diploid or sporophytic generation, and in this way alternation between gametophytic and sporophytic generations keeps on going. Top Menu BiologyDiscussion. Root: Characteristics, Types, Structure and Functions. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes.

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