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Q. Concerning their permeability how are membranes classified?
Membranes can be classified as permeable, impermeable, selectively permeable or semipermeable.
An impermeable membrane is so that through which no substance can pass. Semipermeable membranes are those that let barely solvents, like water, to pass through it. Permeable membranes are those that let solvent and solutes, like molecules and ions, to pass across it. There are as well selectively permeable membranes, i.e., membranes that besides allowing the passage of solvent let only some specific solutes to pass while blocking others.
Primitive Arthropods The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of t
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What are presbyopia and astigmatism? Presbyopia is the visual impairment in which there is loss of the cililary muscle strength therefore reducing the capability of the crystal
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