It is made from the glycoprotein murein.
We will decrease the speed of that corresponding object
S = Distance travelled/ Time.
S = D/t.
This was written poorly, but I assume you are talking about Commensalism:
"An association between two organisms in which one benefits and the other derives neither benefit nor harm."
Advantaged: ants
Neutral party: aphids
Mitochondria, this is because the function of the mitochondria is:
To release energy OR
To produce ATP (both are correct, so whichever you remember easier)