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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.
What is the concept of Lophophore? A unique double ring of hollow ciliated tentacles that surround the oral opening in some animal phyla. There is some debate as to whether the
Q. What do you mean by Primary Visual and Auditory Cortex? Primary Visual Cortex - in posterior aspects of occipital lobes. Receives visual information from optic nerve (crani
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Define Characteristics of probiotics? Are microorganism Promote a healthy intestinal microflora Ensure colonization resistance to pathogens Destruction of ge
Define Mini Nutritional Assessment (MNA) Tool? It is a comprehensive and simple tool, which is able to categorize the subjects into three different categories like well nourish
Q. What is the auditory tube and its function? Auditory tube (Eustachian tube) connects each middle ear to the throat. This tube conducts air between tympanic cavity and outsid
OESOPHAGU S - Gullet opens in oesophagus. First organ of alimentary canal. After piercing diaphragm, it form stomach in abdominal cavity. No digestion in it. Food mov
What is excretion? Excretion in Physiology is the method of elimination of metabolic wastes and other toxic substances from the body.
Wetlands and estuaries are transitional biomes. Land that remains flooded either part of the year or permanently with fresh or salt water is known as wetland. The internationally a
Describe the meaning of Electrical Stimulation Brain stimulation has been used to map connections in the brain and to elicit changes in behaviour. Much of the pioneering work o
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