Metabolism is not found in the prokaryotic cell
The substance that helps keep the integrity of the bacterial cell wall intact is known as the peptidoglycan. Others also refer to is it as murein or mucopeptide. The bacterial cell wall is necessary for survival because of the high internal pressure present inside of bacteria. Under normal conditions, if the cell wall is removed the bacterial cell will burst.
The peptidoglycan is a layer that can be used to distinguish gram positive bacteria from gram negative ones. G(+) bacteria have a thick layer of this while G(-) have a thinner ones.
I believe the answer is a mineral's crystal shape is determined by its atomic structure.
The correct answer is: D. tragedy of the commons theory.
The tragedy of the commons theory explains situation in a system where resources are shared and suddenly the individual users start to act independently. Individual users (in this case world countries) start to act according to their own self-interest behave contrary to the common good of all other users (e.g. fishing companies) by depleting or spoiling that resource (fishes and other marine organisms) through their collective action.