Cide - denoting a person or substance that kills
Ectomy - denoting surgical removal of a specified part of the body
Ism - a distinctive practice, system, or philosophy, typically a political ideology or an artistic movement
Logy - dull and heavy in motion or thought; sluggish.
Bio? I don't really know what you mean but that's a suffix.
In formal writing and communication, the sentence "Mom said she thought Maria had been treated wrongly and that she should stick up for herself." is more appropriate. Although wrong and wrongly are both adverbs, some writers consider using adverbial "wrong" as incorrect, so you might want to play it safe and use "wrongly" instead.
