A Walk Through Time Assignments Check 102 Web Site.
-
date post
15-Jan-2016 -
Category
Documents
-
view
217 -
download
0
Transcript of A Walk Through Time Assignments Check 102 Web Site.
![Page 1: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/1.jpg)
A Walk Through Time A Walk Through Time AssignmentsAssignments
Check 102 Web Site
![Page 2: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/2.jpg)
““Protista”Protista”• One-celled to simple colonies to plant-like (but
these related to simple forms)• Cells eukaryotic• Photosynthetic and heterotrophic metabolisms• Now usually split into several kingdoms• Not plants, fungi, nor animals
Spirogyra
Amoeba
![Page 3: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/3.jpg)
Ecology of the ProtistsEcology of the Protists
• Though small, play major roles* 65 % of earth’s net primary production
(phytoplankton)* Microfeeders of bacteria, other protists* Food for larger plankton & animals* Habitats for other organisms* Decomposers* Parasites of plants and animals
![Page 4: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/4.jpg)
The Eukaryotic cellThe Eukaryotic cell
Paramecium, a ciliated protozoan
This view is under Nomarski phase contrast
![Page 5: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/5.jpg)
Eukaryotic vs. prokaryotic cellsEukaryotic vs. prokaryotic cells
• Size* Prokaryotes ≤ 10 µm* Eukaryotes ≥ 10 µm
• Complexity* Prokaryotes – simple* Eukaryotes – complex
• Location of chromosomes* Prokaryotes – free in cytosol* Eukaryotes – within a nucleus
• Flagellar mechanisms differ
Bacteria & Archea
protists, Fungi, Plants, Animals
![Page 6: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/6.jpg)
Bacterium (prokaryote)
Animal (eukaryote)
Plant (eukaryote)
Figures 7.4, 7.7, 7.8
(Actual size relative to eukaryotes below)
![Page 7: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/7.jpg)
Protista as a single “kingdom”Protista as a single “kingdom”Functional gFunctional groupsroups
• Algae – photosynthetic• Protozoa – non photosynthetic, consumers• Fungus-like Protists – nonphotosynthetic,
hyphal
• Each group is polyphyletic
![Page 8: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/8.jpg)
““Protozoa”Protozoa”
• Protista that are heterotrophic by injestion
• Motile* pseudopodia – amoebas* flagella – flagellates* cilia – ciliates
• Ancent and advanced groups
• Polyphyletic (i.e. phyla not closely related)
![Page 9: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/9.jpg)
PseudopodiaPseudopodia
Movie of Pseudopodial movement in Amoeba
![Page 10: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/10.jpg)
PseudopodiaPseudopodia
Actinophrys
![Page 11: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/11.jpg)
FlagellaFlagella
Paranema
![Page 12: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/12.jpg)
FlagellaFlagella
Giardia
![Page 13: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/13.jpg)
CiliaCilia
Paramecium
![Page 14: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/14.jpg)
Macronucleusw/ micronuclei
behind
Oral groove on surface
Site of cell “anus”
Food vacuoles
Cilia
Undulating membrane in groove (ciliary)
Contractile vacuoles
Paramecium, a ciliated protozoan
![Page 15: A Walk Through Time Assignments Check 102 Web Site.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649d4d5503460f94a2bbb8/html5/thumbnails/15.jpg)
CiliaCilia
Euplotes