A control is a experimental variable that is kept constant or unchanged during an experiment. During a controlled experiment, the controlled variables are held constant to minimize or stabilize their effects on the subject, its unchanging state allows the relationship between the other variables being tested to be better understood.
First you have to figure out the atomic mass of each element(amu) then add them up to find your answer. we already know H2O is 55.5 g/mol. One Hydrogen molecule is 1.01 g/mol, A Carbon molecule is 12.01 g/mol, Oxygen molecule is 16.00 g/mol,Nitrogen molecule is 14.00, and a Sulfur molecule is 32.06 g/mol. Add those up you get 75.08 round to nearest whole number you get 75 g/mol are in a flask of water.
Answer: a. Bacillus subtilis is most the most resistant to high temperature .The endospore which is formed inside the cell wall and tough capsules which are formed help the bacillus to resist the high temperature, when bacillus is exposed to the high temperature the internal bonds present in the bacteria allow the protein chain to form a long chain-like structure when the spore is about to dehydrate.
explanation: Bacillus subtilis is a gram-positive bacteria and it is present in the soil and gastrointestinal of the human and ruminants. The shape of Bacillus subtilis is a rod, which helps in forming endospore which very tough and protective and it helps the Bacillus subtilis to resist very high temperature. The spore which is formed in the Bacillus subtilis helps them to tolerate heat and they can grow in the mesophilic temperature.Bacillus subtilis cell wall is made up of peptidoglycan, which helps to maintain the shape of the cell and help to tolerate the high turgor pressure.
