Which organism is more complex and evolved among Bacteria, Mushroom and Mango tree. Give reasons.

Mango tree is more complex and evolved because it is a eukaryotic, multicellular, autotrophic terrestrial plant. It is also called flowering plant as its reproductive organs are aggregated in a flower. Bacteria is a unicellular prokaryotic organism and fungi (mushroom) is a heterotrophic eukaryotic organism with no body differentiation. Therefore, both of these are simple organism.