1. Protists
Biology 

2. Protist characteristics
Protists are organisms that do not fit into any other kingdom. They can either by uni-celled or simple multicellular. They can be animal-like, plant-like, or fungus-like.
Protists are made up of eukaryotic cells, each containing a nucleus and other organelles.

3. Protist characteristics
A hypothesis for how eukaryotic cells arose:
From prokaryotes that obtained organelles via endosymbiosis.
Protists are often classified:
By how the resemble fungi, plants, or animals
Most protists are unicellular such as an amoeba. Some of these unicellular protists form colonies in which several cells are joined into a larger body, such as Volvox.

4. Protist characteristics
A few protists are multicellular, such as Brown algae. They have specialized regions for reproduction, photosynthesis, and attachment to the ocean floor, but lack true tissues and organs.

5. Protist characteristics
Two ways in which protists obtain energy:
Autotrophy
Heterotrophy

6. Protist characteristics
Protists move via
Flagella
Cilia
Pseudopodia

7. Protist characteristics
Protists reproduce:
Asexually either binary or multiple fission
Sexually conjugation

8. Animal-Like Protists Phylum Protozoa
Single-celled protists that can move independently without cilia or flagella
Have pseudopodia which are large, rounded cytoplasmic extensions that function both in movement and feeding. They engulf small organisms.
Move by amoeboid movement, which is a form of cytoplasmic streaming.
An example of a Protozo is an Amoeba
Harmful to humans in that some can live in human intestines and attack the lining, and may cause disease

9. Animal-Like Protists Phylum Ciliophora
They share one key feature: they have cilia which are: short, hair like cytoplasmic projections that line the cell membrane.
Cilia make it possible for these protists to move.
An example of Ciliophora is Paramecia.
The process in which two Paramecia come together after meiosis to exchange parts of their genetic material is called conjugation.

10. Plant-like Protists Algae Many plant-like protists are known as algae.
Algae are autotrophic protists and have chloroplasts and produce their own carbohydrates by photosynthesis, as plants do. They do not have true roots, stems, or leaves.

11. Plant and Animal-like Protists
Phylum Euglenophyta
Phylum Euglenophyta contain flagellated unicellular algae called euglenoids, which are both plant-like and animal-like.
How are they like plants?
Autotrophic, contain chlorophyll
Have contractile vacuole and chloroplast
How are they like animals?
Lack a cell wall and are highly motile
If raised in dark, do not form chloroplast and become heterotrophs

12. Plant and Animal-like Protists
Where do you find Euglena?
In fresh water, especially water polluted by excess nutrients
How do they move?
Long flagellum

13. Fungus-like Protists Slime mold- can either be:
*mobile, amoeba-like feeding
*sessile, reproductive spore-bearing form
Water mold- composed of branching filaments of cells

14. Protists and Humans Environmental roles of protist producers:
Produce oxygen
Form the foundation of food webs
Recycle materials

15. Protists and Humans
Protists symbiosis:
Corral, fungi, and termites

16. Protists and Humans Protists for food: Seaweeds are eaten directly
Byproducts are used to make cheeses, ice cream, salad dressing, and bakery items.

17. Protists and Humans People use: Alginate is used in cosmetics
Carageenan is used in gelatin capsules
Agar is used to culture microbes

18. Protists and Humans What is Giardiasis? Caused by Giardia lamblia
Reults in diarrhea and cramps

19. Protists and Humans What is Cryptosporidiosis?
Caused by Cryptosporidium paruum
Characterized by diarrhea

20. Protists and Humans What is Trichomoniasis?
Caused by Trichomona vaginalis
An STD that causes discolored discharge and genital itching.