Summary:
- Protists have a nucleus containing their DNA.
- They also have other membrane-bound organelles, such as mitochondria and the endoplasmic reticulum.
- Most protists are single-celled, but some are multicellular.
- They are found in damp soil, marshes, puddles, lakes, and the ocean.
- Some are free-living organisms, others are involved in symbiotic relationships.
- Protists get food through ingestion, absorption, or photosynthesis.