* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name and Surname: DITSHEGO WINNIE Student number: 219004243 Module: ZOOLOGY 1B SUBKINGDOM PROTOZOA CLASS TEST 1 1. A 2. B 3. C 4. C 5. B 6. C 7.How are Protozoans different from bacteria? Protozoans are unicellular, eukaryotic cells with no cell wall, containing no organs ( only have specialised organelles such as Golgi bodies, mitochondria, peroxisomes, lysosomes etc), whereas bacteria are unicellular , prokaryotic cells with no well-defined nucleus and do not have membrane bound organelles such as mitochondria, lysosomes, Golgi bodies, peroxisome, etc. 8. Can Protozoans be considered helpful? Discuss this concept. Yes, they can be considered helpful because they form nucleus and cytoplasm and function in carrying out all the processes including, Nutrition , excretion and osmoregulation, reproduction , Locomotion, and growth. 9. Which lifecycle is found within the salivary glands of the Anopheles mosquito? Oocyst. 10. List 5 individual Protozoans and the diseases they cause in humans. Use correct genus and species names with the correct scientific writing of species (nomenclature). Plasmodium faclciparum – cause malaria disease in humans Giardia- causes giardiasis. Euglena viridis- causes leishmaniasis and African sleeping sickness. Amoeba proteus- causes amoebiasis Trypanosoma brucei- causes Chagas disease and sleeping sickness. 11. Differentiate between gametic and zygotic meiosis in Protozoans. In gametic meiosis, the organism spends most of its life cycle in the diploid (2n) condition and meiosis occurs only at the time of gamete formation. In zygotic meiosis, the organism spends most of its lice cycle in haploid(n) condition, and meiosis takes place at the time of zygote germination. 12. Briefly describe the process of digestion and excretion in Protozoans. Process of digestion in protozoa is described as follows: After the initial acid phase, the cytoplasm of the protozoan forms enzymes enzymes, proteolytic and carbohydrate in an alkaline medium and the enzymes now pass into the food vacuoles and the vacuoles increase in size and become alkaline, the contents of vacuoles are digested. Process of excretion: Waste products ( water, carbon dioxide and nitrogenous compounds) are passed out of the body by diffusion or by contractile vacuoles.