How is a protozan similar to a blue whale and how are they different?

A protozoan and a blue whale are similar in that they are both living organisms that belong to the domain Eukarya, meaning their cells contain a nucleus. However, they differ significantly in size and complexity; a protozoan is a single-celled organism, while a blue whale is a large, multicellular mammal. Additionally, protozoans primarily reproduce asexually and often live in aquatic environments, whereas blue whales are complex creatures with advanced social behaviors and reproductive strategies.