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The water expulsion vesicle (also known as a contractile vesicle) is an important osmoregulatory organelle in freshwater protists, which are hyperosmotic to surrounding water. Water constantly diffuses into cell and could cause the cell to burst if there wasn't some way to get it out. That is what water expulsion vesicle does. A network of collecting tubules extends throughout cells, and rich supply of mitochondria on the surface of tubules provides energy required to pump water from cytoplasm into the tubules. Tubules dump the water they've collected into water expulsion vesicle, which slowly fills. Once full, vesicle's membrane fuses with the outer plasma membrane creating a pore out of which excess water flows.
Explain Lamda and Kappa-carrageenan Lamda-carrageenan at a concentration of 0.05% produces thickening and stabilization. Sodium salts of Lamda and Kappa-carrageenan at a co
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Define Affluence and abundant availability of food as factor for obesity? With increasing affluence, increase in purchasing power and abundance of food, people tend to eat more
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are they diploblastic or triploblastic
Q. Are the veins or the arteries constituted of more muscle tissue? How different are the walls of these two kinds of blood vessels? The arterial system has thicker muscle wall
Define Nutritional Requirements in Cold and Polar Environment? Energy requirements are the major consideration for providing nutritional support in a cold environment. Energy e
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