There are 4 outer atoms and lone pairs that are present in a molecule with a see-saw shape. It was called "seesaw" comes from the observation that it looks like a playground seesaw. It is very common that four bonds to a central atom result in tetrahedral or, less commonly, square planar geometry.
Answer:
D, they are all the same size.
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Cell division is important for many processes such as growth, the healing of wounds, cell repair and reproduction, etc., Not only is cell division play an important role for humans but even for parasites like paramecium. Paramecium use it as a source of reproduction, this action is called binary fission.
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The pipettes can basically be characterized into five grades. these grades includes the serological, disposable, repeat, single channel and multi-channel pipette. The guidelines for the usage of each of these pipettes differ. However, some instructions are common, such as the control of the flow of liquid. The index finger is used for the purpose of controlling the flow of the liquid from the pipette.
Hence, the answer is 'index finger'.