What types of organisms are prokaryotes?
Prokaryotic cells are the most ancient type of cell. They are simple and small and are distinguished by the absence of membrane-bound organelles. Most prokaryotes are microscopic. The most well-known group of prokaryotes is the bacteria. 21. Describe eukaryotic cells. What types of organisms are eukaryotes? Eukaryotic cells are more organized and complex than prokaryotic cells. Various membrane-bound organelles do special tasks within the cells; these include the nucleus (which contains the cell’s genetic material), the mitochondria (where respiration takes place), and, if the cells are part of a plant or other producer, the chloroplasts (where photosynthesis takes place). Plants, animals, fungi, and many other organisms are eukaryotes. 22. Compare unicellular and multi-cellular organisms. One-celled organisms are unicellular. All prokaryotes and some eukaryotes are unicellular. Most eukaryotes are multi-cellular—they are made up of more than one cell. 23. What is “level of organizatio
