protista
TRANSCRIPT
1
Protozoa
2
3
*
* Archaea
4
Kingdom Archaea
• Single celled• Prokaryotic• Make or absorb food• DNA
– Similar to Eukaryotic
• Cell wall– Pseudopeptidoglycan
or protein only
5
Kingdom Protista• Protozoa - 64,000 sp
– Animal like
• Unicellular– Some are colonial
• Motile• Reproduce
– Sexual– Asexual
• Nutrition– Heterotrophic– Autotrophic
6
Origin of Protozoa• Earth is 4.6 billion years old
• Prokaryotic cells date back over 3.5 billion years
• 1.5 Billion years ago– Eukaryotic cells
• Became protozoans
7
Nutrition in Protozoans
• Autotrophs
• Heterotrophs – Phagocytosis
• Mixotrophs
8
9
Fig. 11.4
10
Excretion and Osmoregulation
Contractile vacuoles
11
ReproductionAsexual• Fission
– Binary fission – Budding – Multiple fission
12
Reproduction
Sexual• Isogametes.
– Anisogametes.
• Syngamy • Autogamy • Conjugation
13
Ciliates
14
Ciliates
15
Types of Ciliates
16
Phylum Dinoflagellata
17
Phylum Dinoflagellata
18
Dinoflagellates
19
Zooxanthellae
20
Phylum RetortamonadaClass Diplomonadea
• Giardia lamblia– Giardiasis
• Backpackers disease• Beaver fever
• Inhabits intestines of several animals and man
• Acquired by drinking water with cysts
• Cramping and diarrhea
21
22
African Sleeping Sickness
• Parasite - Trypanosoma • Chronic disease lasting
years.• Affecting countries of
western & central Africa.• Vector - Tsetse fly
(Glossina)• Reservoirs - infected wild
animals and humans
23
African Sleeping Sickness
24
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Tsetse fly Trypanosome
25
26
Plasmodium
• Malaria• Most important parasitic
disease of humans today• WHO estimates that 270
million new cases occur annually with 2 million annual deaths
• Transmitted by bite of infected mosquitoes of genus Anopheles
27
28
29
Toxoplasma• Toxoplasmosis• Parasite
– Cats, man, other mammals & birds
30
• Fetus– Birth defects– Mental retardation
• Aids Patients– Fatal infection
31
Eimeria
• Coccidiosis– Birds and mammals
• Bloody diarrhea
32
Coccidiosis
33
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Amebas
34
Entomoeba histolytica
• Amoebic dysentery• Transmitted by food &
water contaminated with cysts
• Bloody diarrhea
35