1. Humans: We are multicellular eukaryotes, meaning we are made up of many cells with a nucleus and other membrane-bound organelles.

2. Mushrooms: These are fungi, a kingdom of eukaryotic organisms that are heterotrophic (meaning they get their food from other organisms) and often saprophytic (meaning they decompose dead organic matter).

3. Amoeba: This is a single-celled eukaryotic organism that is a protozoan, a group of microscopic organisms that are often found in water.

Let me know if you'd like more examples or want to delve deeper into any of these organisms!