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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.
Eutrophication - Effect on Water Bodies Moderate quantities of sewage decay naturally in a water body and water gets purified after some time. But the problem arises when the
Define Protein-Energy malnutrition - Nutritional Deficiency? Even in normal times, PEM is a problem in many developing countries, most commonly affecting children between
How are ecological interactions classified? Ecological interactions are divided as intraspecific or interspecific interactions and as harmonious or inharmonious interactions.
Explain about Chlorophylls Chlorophylls are used as colourants in a range of foodstuffs and both natural chlorophyll (containing magnesium as the central metal ion) and 'coppe
Initial Maintenance Steps of implants It is very essential, that from the beginning of the patient interaction regarding the implant therapy, through the diagnosis and planning
Growth Regulators Besides the major five hormones, polyamines can also exert regulatory control over growth and development at micromolar concentrations. They are widespread a
Cinemicrography Earlier it was impossible to follow the evenvts within the cell due to: i) non-visibility of cell organelles under a light microscope, ii) maintenance of cells
Polyembryony Presence of more than one embryo in a seed is termed polyembryony. The phenomenon, first discovered in orange seeds by Leeuwenhoek (1719), attracted considerable
Into which subphyla are the protochordates divided? What are some representatives of each protochordate subphylum? Cephalochordates and Urochordates (or tunicates) are the two
Is nitrogen is important plant nutrients Nitrogen is an important plant nutrient which is assimilated by most of the plants as nitrate and ammonium ions. Organic matter is the
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