**Answer everything. Explain everything. Do not write in cursive. Do all 3 and h
ID: 199334 • Letter: #
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**Answer everything. Explain everything. Do not write in cursive. Do all 3 and high rating will be given**
The first 8 questions relate to the projector screen slides, labeled by question number 1) What shape of cell and gram stain result are these bacteria? e) coccv a) bacilli/+ b) cocci) spirilli4 ) bacilli- 2) This image shows a) mold b) lichen c) yeast d) bacterial colonies 3) This image is a(n) a) amoeba b) foraminifera ) radiolarian d) dinoflagellate e) diatom ) This image is a(n) b) foraminifera )radiolarian d) dinoflagellate e) diatom a) amoeba 5) This image is an organism from the group a) Amoebozoa b) Euglenozoa c) Alveolata d Stramenopiles 6) The structures indicated by the arrow are the a) asexual structures of a zygomycota c) asexual structures of an ascomycota d) sexual structures of a basidiomycota b) sexual structures of a zygomycota 7) In which group does this macroscopic structure belong? a) Basidiomycotab) Zygomycota c) Ascomycotad) Its not a fungus. 8) This micrograph shows a) conidia b) the ascus ) the basidia d) a zygosporangiumExplanation / Answer
1. a)Gram-positive bacilli.
The process of gram staining is used to differentiate bacteria into two large groups based on different physical properties of their cell wall. Gram-positive bacteria which have a thick peptidoglycan wall retain the crystal violet dye after staining them violet or purple, while all other bacteria with thin peptidoglycan wall covered by an outer membrane can be stained pink using a counterstain (safranin) added after the crystal violet dye. Since, in the diagram, it is shown as purple color with rods (bacilli), suggests that it might be gram-positive bacilli.
2. b) lichen. symbiotic association of algae and fungi with a plant-like form (which is shown in the diagram).
3. a) amoeba. Amoeba are shapeless unicellular organisms and cell's organelles and cytoplasm are enclosed by the membrane. They usually have pseudopodia for navigation which we can see in the given image.
4. Formanifera. These are single-celled organisms with shells. The morphology of foraminifera consists of chamber arrangement with characteristic net-like pseudopodia called reticulopodia.
5. b) Euglenozoa. These euglenids (for example, Euglena) include many photosynthetic species and so were once thought to be phytoflagellates. Under microscopy, they have a unique chloroplast structure that is not similar to that found in any other photosynthetic protist. Instead, the flagellum has a lattice-like supporting rod and the cell membranes is underlain by ribbons of unique microtubules.
6. a) asexual structures of Zygomycota. In asexual reproduction, spores are formed internally in sporangium and are released which we can observe in the image whereas sexual reproduction occurs between + and - strain forming a zygospore which may lie dormant for a long period of time.
7. a) Ascomycota. These are commonly referred as sac like fungi called ascus where they store spores. Since the appearance is sac it may be Ascomycota.
8. c) the basidia. These are basidia along the hyphal wall which is the characteristic of Basidiomycota phylum eg: Mushroom.
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