Algae are protists because:
- They are eukaryotic, unicellular organisms with the characteristics belonging to Kingdom Protista , algae are categorised as belonging to this kingdom.
- The majority of algae are watery, photosynthetic organisms that do not fall under either the animal or plant kingdoms.
- In addition to their ecological roles as oxygen producers and the main source of sustenance for almost all aquatic life, algae are commercially important as a source of crude oil, food, and a variety of pharmaceutical and industrial products for humans.
Kingdom Protista:
- The kingdoms of fungi, animals, and plants are connected to this one.
- The protist cell body has numerous membrane-bound organelles in addition to a clearly defined nucleus, just like other eukaryotes.
- Others lack cilia or flagella, while some do.
- Protists can reproduce sexually and asexually through cell fusion and zygote formation.
- The possibility exists that it is holotropic or photosynthetic.