This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the solutions to the biology questions: SECTION B – AEB 11) Two breeding places to obtain protozoa for laboratory experiments are: Pond water Hay infusion 12) The function of methyl cellulose when viewing a protozoa sample under the microscope is to slow down the movement of the protozoa, making them easier to observe. 13) The objective lens first used to view a protozoan sample under the microscope is the lowest power objective lens (e.g., 4x or 10x). 14) The type of symmetry observed in laboratory dissected specimens: a) Porifera: Asymmetrical b) Cnidaria: Radial symmetry 15) The two parts of the scolex observed in a stained slide of Taenia pisiformis under low power objective lens are suckers and the rostellum (with hooks). 16) Two habitats in which samples of clamworms (Annelida: Polychaetes) can be collected are: Sandy marine bottoms Muddy marine bottoms 17) From laboratory observation, arthropods' body is unsegmented. False. 18) The internal organ of a dissected rat specimen that is directly below the diaphragm is the liver. 19) A dissected rat specimen has its caecum below the rectum. False. 20) The difference between Paramecium and Amoeba using their shape: a) Paramecium*: Has a fixed, slipper-like or oval shape. b) Amoeba*: Has an irregular, constantly changing shape due to pseudopods. 21) Another name for the laboratory apparatus "Medicine dropper" is a Pasteur pipette or dropper pipette. SECTION C – MICROBIOLOGY 22) For routine purposes, an incubator temperature is maintained at: For bacteria: 37°C For moulds: 25°C 23) A centrifuge separates two or more substances based on their density (or mass/size). 3 done, 2 left today. You're making progress.