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Archaea/Bacteria 1
Lab one Archaea and Bacteria
| Question | Answer |
|---|---|
| Name the 3 domains | Archaea, Eukarya and Bacteria |
| Name the 6 kingdoms | Animalia, Protista, Fungi, Archaea, Bacteria and Virdiplantae |
| Which 2 domains are prokayotic? | Archaea and Bacteria |
| Define cladistics | procedure used to create an evolutionary tree based on shared derived characteristics |
| Define clade | group of organisms related by evolutionary decent |
| Define natural selection | differential perpetuations of genotypes over time |
| What two factors must be present for natural selection to occur? | 1. MUST have genetic variability among/within organisms 2. MUST have pressure from the environment |
| Define micro-evolution | change in allele frequency |
| Natural selection is a process by | which micro-evolution occurs |
| Define symbiosis | two organisms closely interacting |
| What are the three types of symbiosis | mutualism, commensalism and parasitism |
| Define mutualism | all organisms benefit |
| Define commensalism | one benefits but the other is not effected |
| Define parasitism | one benefits and the other one is hurt |
| Define endosymbiosis | one lives within the other |
| Characteristics of prokaryotic cells | 1. No membrane bound organelles 2. Cell Wall 3. Circular DNA 4. No introns (only coded DNA) |
| What are the four shapes of bacteria? | bacillus, cocccus, spirillum, and vibroid |
| Bacillus | rod-shaped bacteria |
| Coccus | sphere-shaped bacteria |
| Spirillum | spiral-shaped bacteria |
| Vibroid | comma-shaped bacteria |
| Three types of heterotropic bacteria | 1. Primary decomposers (anaerobic environment) 2. Secondary decomposers (aerobic environment) 3. Pathogenic (disease causing in humans) |
| Two types of autoropic bacteria | 1. Photoautotropic (energy from sun; cyanobacteria) 2. Lithoautotrophic (fix CO2 from rocks) |
| Define binary fussion | one parent cell produces two identical daughter cells |
| What 2 processes cause genetic variations in bacteria? | 1. conjugation 2. mutation |
| Define conjugation | passing of DNA between two bacterial cells via a pilius |
| What are the four phases of growth? | 1. lag 2. exponential growth 3. stationary growth 4. death |
| Define hyperosmotic | there are more solutes within the cell than solvent outside of the cell; water constantly wants to rush in |
| Define peptiodglycan | thick layer of protein which makes up the cell wall of bacteria |
| Gram (+) | thick peptiodglycan (holds stain during test) |
| Gram (-) | thin peptiodglycan (does not hold stain during test) |
| Oscillatoria | cyanobacteria; long green rods |
| Nostoc | cyanobacteria; clumped together cells |
| Merismopedia | cyanobacteria; coccus in small groups |
| Gloeocapsa | cyanobacteria; coccus in large groups |
| Spirulina | cyanobacteria; long green spirals |