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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.
How does biological diversity relate to the characteristics of the abiotic factors of an ecosystem? The availability of abiotic factors as light, moisture, mineral salts, heat
Steps of Research Process: Identify the Problem: The first task in the planning stage is to identify and stage the problem, as you have already learnt in the earlier
What is an example of an ion of biological importance? Sodium in one, but so are potassium and calcium
Messenger RNA (mRNA) are the proteins are not synthesized directly from the genomic DNA. Insteadof that an RNA template (a precursor mRNA) is constructed from the sequence of gene
Which type of reproductive structure has a better chance of survival if there was a sudden temperature change in its environment? A.)asci B.)zygosporangium C.)basidium D.)lichen
how does these phylem parasites????
What is resting membrane potential of a neuron? What is the function of sodium potassium pumps in maintaining it?
What is Classic Blalock-Taussig BT Shunt in Shunt Operations ? Subclavian artery, which arises from innominate artery, is anastomosed to pulmonary artery. In a patient with lef
Dietary fibre Dietary fibre: Typhoid patient has an inflamed intestinal mucosa, which can be easily perforated and ulcerated leading to internal haemorrhage. Thus foods hig
what are the advances of cell biology
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