html5-img
1 / 19

Protists

Protists. PROTISTS. We have already learned about Bacteria and Viruses Now it’s time to study Protists MICROBES: Viruses Bacteria Protists ?. PROTISTS. Protists can be very different from each other. All protists are EUKARYOTES = DNA is found in a nucleus

tamas
Télécharger la présentation

Protists

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Protists

  2. PROTISTS • We have already learned about Bacteria and Viruses • Now it’s time to study Protists MICROBES: • Viruses • Bacteria • Protists • ?

  3. PROTISTS • Protists can be very different from each other. • All protists are EUKARYOTES = DNA is found in a nucleus • Some are like animals, some are like plants, some are like fungi, but they are a little different. So they are Protists. • All live in moist environments • Some are UNICELLULAR, while others are MULTICELLULAR

  4. PROTISTS • Some are HETEROTROPHS • Some are AUTOTROPHS • Some are BOTH What are heterotrophs? Autotrophs? Imagine being both….

  5. PROTISTS 3 CATEGORIES OF PROTISTS: • Animal-like Protists • Plant-like Protists • Fungus-like Protists

  6. Animal-like PROTISTS ALSO CALLED PROTOZOANS • All animal-like protists are HETEROTROPHS • Most are able to move from place to place to get their food. 4 GROUPS OF PROTOZOANS: • Protozoans with PSEUDOPODS • Protozoans with CILIA • Protozoans with FLAGELLA • Protozoans that are PARASITES

  7. Protozoans With Pseudopods • Sarcodines have PSEUDOPODS = means “false foot”. Part of the cytoplasm bulges towards one location, and the rest of the organism follows. • Sarcodines include: Amoebas • Amoebas also have CONTRACTILE VACUOLES = a structure that collects extra water then squirts it out from the cell.

  8. An Amoeba

  9. Protozoans With Cilia • Ciliates have CILIA = hair-like projections from cells that move with a wavelike motion. • Ciliates include: Paramecium • Paramecium have 2 Nuclei, 2 contractile vacuoles, and can reproduce asexually and sexually.

  10. Paramecium

  11. Protozoans with Flagella • Flagellates have flagella • Some of these live inside other organisms. • SYMBIOSIS = a close relationship in which at least one of the species is helped. • MUTUALISM = a close relationship in which both species are helped.

  12. Protozoans that are Parasites • Some protozoans feed on the cells of their host and cause harm.

  13. Plant-like PROTISTS • Commonly called ALGAE (that green stuff on a pond) • All are AUTOTROPHS THE DIFFERENT GROUPS OF ALGAE: • Diatoms • Dinoflagellates • Euglenoids • Red Algae • Green Algae • Brown Algae

  14. Euglenoid

  15. Fungus-like Protists • All are HETEROTROPHS • All have Cell Walls • All use SPORES to reproduce • All can move at some point in their lives THE 3 KINDS OF FUNGUS-LIKE PROTISTS: • Slime molds • Water molds • Downy molds

  16. Slime Mold

  17. Good things Protists do • Symbiosis and mutualism with other organisms. • Algae are main source of oxygen in atmosphere. • Provide food for other organisms • Household products (diatoms)

  18. Bad things Protists do • Cause disease • Attack crops

More Related