1. Kingdom Protista

2. If you look at a drop of pond water under a microscope, all the "little creatures" you see swimming around are protists.

3. Prokaryotes are organisms that are not as organized and do not have a nucleus.
All protists have a nucleus and are therefore eukaryotic.
Protists are either plant-like, animal-like or fungus-like.

4. Protists: Kingdom Protista
Protists: Kingdom Protista. Includes protozoans, most algae, and some fungi (slime mold)
Plant-like protists are autotrophs – they contain chloroplasts and make their own food.
Animal-like and fungus-like protists and are heterotrophs.

5. Protozoans are animal-like protists (heterotrophs) grouped according to how they move.
The word protozoa means "little animal." They are so named because many species behave like tiny animals—specifically, they hunt and gather other microbes as food.

6. Protozoa are classified into three general groups based on how they move.
Cilia – tiny hairs
Flagella – whip
Pseudopod – false feet
Non-motile – cannot move at all

8. Amoebae ooze along by means of pseudopodia (false feet) engulfing food as they go.
Amoebae live in water or moist places.
They have a cell membrane but no cell wall.

9. Amoeba

10. Flagellates are generally the smallest of the protozoa and have one or several long, whip-like projections called flagella poking out of their cells.
Flagellates use their flagella to move.

11. Giardia lamblia – a flagellate
Causes beaver fever
Fatigue, diarrhea, cramps, weight loss
Does not harm beavers but can harm humans

12. Flagellates

13. Ciliates are generally the largest protozoa.
They are covered with hair-like projections called cilia and they eat the other two types of protozoa as well as bacteria.
Ciliates are found in every aquatic habitat.

15. Ciliates

17. Paramecium – a ciliate

19. Sporozoans are the last group.
These are parasitic and nonmotile. This means they feed off of others and cannot move at all.

20. They produce much of Earth’s oxygen.
Plant-like protists are algae. Algae are eukaryotic (organized and have a nucleus) autotrophs (make their own food).
Photosynthetic algae are the most important primary producers of the world’s freshwater and marine ecosystems
Many are microscopic
Some are huge: kelp
They produce much of Earth’s oxygen.

21. Diatoms
Giant Kelp

22. One kind of algae, Euglenoids, are both plant-like and animal-like.
Euglena are autotrophs since they make food from sunlight
and
Heterotrophs since they ingest food from surrounding water.

23. Euglenoids

24. Euglena
Euglena can become so numerous it may turn the water of a pond bright green.
Euglena can move by flexing their bodies and changing their body shape. This is called Euglenoid motion.
Euglenids have the ability to lose their chloroplasts. If you kept Euglenids in the dark, they start feeding on organic matter and may lose their pigment. There are many species without chloroplasts.

25. Another kind of algae are green and are called chlorophytes.
Most green algae are found in fresh water habitats.

26. Volvox are a kind of chlorophyte
Volvox are a kind of chlorophyte. They form large, spherical colonies in fresh water.