Lesson Flashcards
(26 cards)
What are Sarcodina?
Protozoa that use pseudopodia for movement and feeding
Example: Amoeba
What is the locomotion mechanism of Ciliophora?
They move using cilia distributed in rows or patches
What are the two types of nuclei found in Ciliophora?
- Macronucleus
- Micronucleus
What is the only human parasite representative of Ciliophora?
Balantidium coli
What are general characteristics of protozoa?
- Microscopic in size
- 65,000 identified species with almost half extinct
- Found in freshwater, marine, and moist terrestrial habitats
- Make up part of the zooplankton
Who first observed protozoa and when?
Leeuwenhoek in 1675
How do protozoa obtain nutrition?
- Autotrophic
- Heterotrophic
- Saprozoic
What types of locomotion do protozoa exhibit?
- Pseudopodia
- Flagella
- Cilia
What is the process of respiration in protozoa?
Diffusion through the general body surface
What are the main forms of reproduction in protozoa?
- Asexual: budding, binary fission, multiple fission
- Sexual: conjugation, fusion of gametes
What does the term ‘protozoa’ mean?
Derived from Greek meaning ‘first animals’
What distinguishes protozoa from other organisms?
They are unicellular eukaryotic micro-organisms
What are the two classes under Apicomplexa?
- Coccidia
- Haematozoa
What reproductive processes do Coccidia undergo?
- Asexual: schizogony (merogony)
- Sexual: sporogony
What are the characteristics of Mastigophora?
- All are flagellates
- One or more whip-like flagella
- Asexual reproduction by binary fission
Name examples of organisms in Mastigophora.
- Giardia
- Trichomonas
- Trypanosoma
- Leishmania
What are the four main groups of protozoa based on locomotion?
- Sarcomastigophora
- Apicomplexa
- Ciliophora
- Cnidospora
Fill in the blank: Sarcodina are typically _______.
amoeboid
What is binary fission?
Asexual reproduction where a single protozoan divides into two individuals
What is the main characteristic of Apicomplexa?
Complex life cycle with alternating sexual and asexual phases involving two different hosts
What is the term for sexual reproduction in protozoa?
Conjugation
Plasmodium is under which class
Apicomplexa/sporozoa
The protoplasm in protozoans is differentiated into
Endoplasm and ectoplasm
In protozoans, the body is bounded by a definite layer called
Pellicle
