Reproduction and symbiotic lifestyle in protozoa|zoology Miller Harley chapter 8

1. Reproduction &Symbiotic
lifestyle in Protozoa

2. Reproduction in Protozoa

3. Sexual Reproduction
• Gametes formation occur.
• Fusion of gametes.
• Except ciliated Protozoa:
 Gametes are produced by mitosis and
meiosis follows union of gametes.

4. Asexual Reproduction
• Binary fission
• Division of nucleus
• Division of cytoplasm
• cytokinesis:
 Longitudinal
Transverse
• Budding

5. Multiple fission/Schizogony
• Multiple mitotic divisions
• Production of certain number of nuclei
• Cytoplasmic divisions
• Separation of each nucleus
• Production of new clls

6. Symbiotic lifestyle in
Protozoa

7. Symbiosis
• Gr.syn, with+bios,life
• It is an intimate association between two
organisms.
• Symbiosis is further divided into:
• Parasitism
• Commensalim
• Mutualism

8. Parasitism
• One organism lives in or on a second organism
called host
• Host is harmed but usually survives.
• Some paraaites have multiple hosts:
Definitive Host
Intermediate Host

9.  Commensalism
• One member of the relationship benefits
and second member is neither benefited nor
harmed.
Mutualisms
• Both species benefit.