did cells loose their cell wall due to evolution or did they never have a cell wall to begin with? pls explain

Answer 1

https://www.quora.com/Why-did-animal-cells-lose-the-cell-wall-feature-or-is-it-that-an-animal-cell-like-entity-previously-existed-and-evolved-into-cells-with-cell-walls-which-are-now-plant-cells

Answer 2

I appreciate your response. According to what is said on the link provided, would you consider that eukaryotic cells got rid of their cell wall to benefit as a heterotroph?