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Exam #2
Bio Final
| Question | Answer |
|---|---|
| some bacillus species | can produce antibiotics |
| myxospores | are not as resistant to the environment ans endospores |
| cyanobacteria | can produce blooms in lakes or ponds under the right environmental conditions |
| Bdellovibrio | undergo multiple fission during their life cycle |
| Photobacterium are bioluminescent | in the presence of oxygen |
| Protozoa | are chemeheterotrophs have no cell walls found in aquatic environments engulf their prey through phagocytosis are NOT multicellualr |
| Fungi are | saprophytic have cell walls made of chitin can grow in extreme PH conditions CANNOT survive harsh environments |
| Yeasts can produce carbon dioxide and alcohol from sugars in the (blank) of oxygen | presence |
| archaea | posses histone like proteins |
| in the process of transformation in bacteria | DNA from the environment is taken up by host cells and only certain species of bacteria are capable of picking up free DNA from the environment |
| Filtration Methods | used on heat sensitive materials like antibiotics to remove microorganisms |
| Iodine | can be used as a skin antiseptic |
| Phenols | can be used in labs as disinfectants |
| Gamma Radiation | advantageous over UV radiation in some cases because it penetrates deeper into objects |
| when a bacterium like E.coli, which is not halophile, is placed into a hypotinic solution the following will happen to the bacterial cell | water rushes in and the cell bursts. lyse |
| one difference between algae and green plants | no vascular system in algae can produce agar |
| under starvation conditions myxobacteria | produce fruiting bodies |
| dinoflagellates can cause problems for humans because | they produce neurotoxins that can affect humans |
| caulobacter has a stalk that is used for | nutrient absorption or sticking to solid surfaces |
| thermoacidophile means they love what kind of environments | hot and acidic environments |
| Mycorrhizae are associations of | fungi and plants |
| Diatoms have a cell wall that is different from bacteria because it is made up of | sillica |
| the technique of treating milk to make it safe for human consumption is called | pasteurization |
| autoclave is used to | sterilize kills all living cells,spores and viruses |
| bacteriolytic | kill other bacteria |
| cyanobacteria and green plants are both | photosynthetic |
| Discuss the role of methanogens in the cow rumen OR in sewage treatment plants | In either example, have to emphasize the specific role that methanogens play in breaking down complex compounds to simpler compounds including methane gas in either enivironment. |
| Discuss WHY scientists were surprised to find organisms like giant tube worms growing around hydrothermal vents and describe HOW it is believed these worms are able to survive | |
| Using sickle cell anemia as an example, discuss how mutations at the genotype level can bring about changes to an organism at the phenotype level | the hemoglobin gene has been mutated at the genotype level and this causes the function and structure of the hemoglobin to change. This leads to sickle shaped red blood cells which cannot carry out the functions like normal red blood cells. |
Created by:
lnkek
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