Yes, it can. There are two glycerol enantiomers, depending on the position of OH group on the second carbon atom.

Mainly because enantiomers have identical physical and chemical properties. However, the difference between two enantiomers can have tremendous impact, especially in biological systems, because many important biological molecules are chiral.

Aldoheptoses have seven carbon atoms and one chiral center, so they can have a maximum of 2^1 = 2 enantiomers.

Chiral molecules have mirror-image isomers

Epimers are those carbons that have "H" and "OH" are present and they can change their position

Enantiomers are special type of isomer these are mirror image to each other