Electron microscopes use _beam of electrons___ in order to allow for higher magnification and more detail when viewing specimens.
Explanation:
A beam of electrons has a shorter wavelength than normal light used in light microscopes, by approximately a factor of X 100000. Therefore, electrons microscope have the inherent attribute of having a very high resolution. They have been used to discover very small organelles in cells such as the ribosomes and mitochondria that cannot be clearly viewed even with the highest resolution in light microscopes.
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Answer:
Energy is not a requirement for the occurrence of osmosis
Explanation:
Osmosis is a passive method of water movement driven by the concentration gradient between the cell's membrane and the extracellular fluid. In OSMOSIS, water moves from a region of low solute concentration/high solvent concentration to a region of high solute concentration/low solvent concentration via a semi-permeable membrane.
Water will naturally move across a living cell's membrane when the concentration of the solute in the cell differs from that of the extracellular solution. Osmosis is a special type of diffusion, hence, no energy is expended by the cell to perform this process. This is why it is called a PASSIVE transport.