Protozoans
Caroline Fowle, John Ligtenberg
Rhizopoda
• Pseudopodia
• Amoeba
– Many Nuclei
– Contractile vacuole
• Radiolarians
– Thin, tall pseudopodia
– Central capsule
• Heliozoans
– Simpler scales and spines
http://youtube.com/watch?v=7pR7TNzJ_pA
Differences
• Heliozoans:
– Microtubule projections smaller
– Axopods
• Radiolarians:
– Have central capsule
• Amoeba
– Multiple Nuclei
– Contractile vacuoles
Foraminiferans
•
•
•
•
Cytosol extends out
Calcium shells
Decompose to calcareous ooze
Alternation of generations
– Gamont: single nucleus
– Schizont: multiple nuclei
Uses of Forams
•
•
•
•
Act as bioindicators
Are used to locate oil
Relative dating of rocks
Reconstructing ocean currents
Calcareous Ooze
•
•
•
•
Calcium based
Not in deep sea
Decomposed organisms
Covers 1/3 of earth’s suface
Paramecium
Unique structures:
Cilia
2 types of nuclei
Contractile vacuole
Terms:
Syngamy
Micro/macronuclei
Conjugation
Soccer Game Questions
1. Calcareous ooze is formed by what?
2. Which type of protozoa has two types of nuclei?
3. What are 3 uses for foraminiferans?
4. Foraminiferans have shells composed of what element?
5. What is the fusion of 2 haploid micronuclei to create a diploid?
6. Because of its freshwater environment what organelle is used?
7. How does (answer to number 6) function?
8. Which microtubule is used by paramecium?
9. What is this:
10. A? 11. B? (Same picture as 10) 12 and 13: describe the step
A
12
B
13
Soccer Game Questions
14. What is the diploid stage of a foraminifera called?
15. What do foraminiferans become after they die?
16. Name a difference between heliozoans and radiolarians.
17. What is the haploid stage of a forminifera called?
18. What are the “spokes” coming off heliozoans called?
19. How do radiolarians stay bouyant?
20. Which rhizopod has a contractile vacoule?
21. Name a use of calcareous ooze.
22. What do Rhizopds use to move?
23. What is the rhizopod in picture A?
24. What are the objects in picture B?
25. What is the principal compositions of calcareous
ooze?
B
A