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Cleavage - Development Biology
Cleavage or segmentation is a series of cell divisions of the fertilized .egg through which it is converted into a multicellular structure, called blastula. The main characteristics of cleavage include:
The cell divisions in the somatic cells are mitotic. The daughter cells or blastomeres or cleavage cells are also derived as a result of mitotic divisions of the zygote. We may ask whether there are any differences between mitotic divisions of somatic cells and, of the zygote and the blastomeres derived from it during cleavage.
Define the term- Ultrafiltration Ultrafiltration occurs when the flow of a substance across a cell membrane is increased by a hydrostatic pressure. This process was initially b
Centrioles Centrioles is also called cell centre . Centrosome discovered by Benden . T. Boveri called it centrosome. Centrosome is present in all animal eukaryotic
Q. As a result of the DNA replication two DNA molecules come into existence. Why is it not correct to assert that the two "new" DNA molecules are created? What is the name given to
Explain Mechanism of Absorption of Haem Iron? Haem iron is soluble in the alkaline environment of the intestine. It binds to the receptor on the enterocytes and is internalized
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1. Noise producing industries, railway stations, and aerodromes should be located away from the residential areas. 2. Check on the traffic in the residential colonies.
Q. What are the general functions of the connective tissues? The major functions of the connective tissues are: filling and supporting of spaces, cellular nutrition, energetic
How intracellular cytoplasmic calcium concentration is maintained? Intracellular cytoplasmic calcium concentration is maintained by the following mechanisms: a) Limited entr
Determine the Food Source for Phosphorus? Phosphorus is widely distributed in food. Food phosphorus is a mixture of both organic and inorganic forms although the relative amoun
What is Plant Tissues explain there types? Vascular plants have separate organs to carry out specialized functions. For instance, leaves function to convert radiant energy to
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