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Q. What are the major events of the first mitotic period?
The first mitotic period is the prophase. During prophase the following events occur migration of each centriole pair centrioles were duplicated in interphase to opposite cell poles aster formation around the centriole pairs formation of the spindle fibers in between the two centriole pairs end of chromosome condensation disintegration of the nucleolus breaking of the karyotheca dispersion of condensed chromosomes in the cytoplasm binding of chromosomes to the spindle fibers.
Characteristic features of Phylum Cnidaria All are aquatic animals. Radial or biradial symmetry around an oro-aboral axis, but no head. Diploblastic, with an epidermi
Metazoan Branches The Kingdom Animalia comprises all the multicellular animals (metazoans). These are divided into three branches: Mesozoa Parazoa Eumetazoa
why is obelia considered to of special interest in Zoology as an animal showing an intermediate grade of organisation?
Mitochondria, which fuel life's processes in all cells, uses nutrients from digested food and oxygen which has diffused across cell surface. In freshwater protozoans water expulsio
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Evolutionary Implications of Natural Regulation Many changes in abundance can be attributed to changes in extrinsic factors such as weather, disease or predation. But some cha
THE PHYSIOLOGY OF LACTATION
Induction of antimicrobial substances Phytoalexins are antimicrobial substances produced by plants in response to pathogen. They accumulate at the site of infection. For exam
what is the clear explanation of growth and development
EVOLUTION OF MAN - Mammals evolved from primitive reptiles (therapsida) in Triassic period, about 210 million years ago. Mammals existed as inconspicuous group of small
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