AP BIOLOGY

Detailed explanation-1: -Since propane comprises three carbon atoms and these atoms cannot be arranged differently, there are no possible isomers of propane.

Detailed explanation-2: -Therefore, there are no such isomers possible for propane.

Detailed explanation-3: -There are no isomers of propane as such because if we look at the structure of propane we can see that it does not have enough carbon atoms to exist in the form of branched isomer.

Detailed explanation-4: -As given structure contains only three carbon atoms and no substituents are present in it, therefore, it does not form any structural isomer.