Add spaces: Toprepareaten-foldserialdilution,transfer20lliquidintothesecondrowandrepeatthisprocedureuntilthesixthdilution.

Answer: To prepare a ten-fold serial dilution, transfer 20 lliquid into the second row and repeat this procedure until the sixth dilution.

Add spaces: Thisisstableandwelltestedsoftware,whichchangesonlyifmajorsecurityorusabilityfixesareincorporated.

Answer: This is stable and well tested software, which changes only if major security or usability fixes are incorporated.

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Answer:
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