Presentation on theme: "KEY CONCEPT Kingdom Protista is the most diverse of all the kingdoms."— Presentation transcript:
1KEY CONCEPT Kingdom Protista is the most diverse of all the kingdoms.
2Protists can be animal-like, plantlike, or funguslike. Protists are eukaryotes (meaning they have a nucleus and other organelles) that are not animals, plants, or fungi.
3Animal-like protists consume other organisms. They are called heterotrophsThey are often predators.
4Plantlike protists are photosynthetic. single-celled, colonial, or multicellularno roots, stems, or leavesDiatomsKelp
5Funguslike protists decompose dead organisms. heterotrophscan move, whereas fungi cannot
6Protists are difficult to classify. Protista is often called one kingdomBut it may be broken down into more than one after scientists learn more about them.
7Protist classification will likely change. Some protists are not closely related.Molecular evidence supports reclassification.Know this!!
8KEY CONCEPT Animal-like protists are single-celled heterotrophs that can move.
9Animal-like protists move in various ways. Animal-like protists are often called protozoa.macronucleusfood vacuoleoral groovemicronucleuscontractile vacuolecilia
10Protozoa with flagella are zooflagellates. flagella help zooflagellates swimmore than 2000 zooflagellates
11change shape as they move Some protists move with pseudopods.change shape as they moveamoebas
12Forams Some protists move with pseudopods. change shape as they move amoebas and…Forams
13cilia help protists swim and capture food Some protozoa move with cilia.cilia help protists swim and capture foodmore than 8000 ciliatesmacronucleusfood vacuoleoral groovemicronucleuscontractile vacuolecilia
14Some animal-like protists cause disease. Protists cause some well-known infectious diseases.sporozoiteshuman liverliver cellsdevelopedparasitesred bloodcellsMalaria is caused by Plasmodium and spread by mosquitoes.Sleeping sickness is caused by Trypanosoma and spread by flies.A giardia infection is caused by Giardia and spread through water.Malaria Infection
16Plantlike protists can be single-celled or multicellular. Photosynthetic plantlike protists are called algae.colonydaughter colonyVolvox
17Do photosynthesis, but are protected by a silica (glass) shell Protists(Diatoms)Do photosynthesis, but are protected by a silica (glass) shell
18mostly photosynthetic Euglenoids are a large group of plantlike protists.mostly photosyntheticsome heterotrophicsingle-celledone or two flagellapelliclenucleuschloroplasteye spotcontractilevacuoleflagellum
19have stiff protective plates Dinoflagellates are mostly marine plantlike protists.have two flagellamay be bioluminescenthave stiff protective platescan cause red tideDinoflagellates
20Multicellular algae are classified by their pigments. Green algae contain chlorophyll a and b.Brown algae contain chlorophyll c.Red algae contain chlorophyll a and phycoerythrin.thickening agents used in ice cream like agar and carrageen come fromRed Algae!
21Many plantlike protists can reproduce both sexually and asexually. All algae can reproduce asexually.Multicellular algae can fragment.Chlamydomonas divides into zoospores.
22Some algae produce sexually. Some species alternate generations.Sexual reproduction can be triggered by environmental stress.
24Slime molds and water molds are funguslike protists. Slime molds have both funguslike and animallike traits.decomposers, like fungican move, like animals
25Slime molds can be plasmodial or cellular. Plasmodial slime molds are giant cells with many nuclei.Cellular slime molds contain independent cells.Watch ‘em move:
26Water molds are freshwater, funguslike protists. one type of water mold caused Great Potato Famine of Ireland in the 1800’smade of branching strands of cellscan be parasites of plants or fishIf you see a dead-fish with filiments on it, that’s a watermold