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BSC 109 Exam 1 questions well answered to pass
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BSC 109 Exam 1 questions well answered to pass
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BSC 109 Exam 1What are the steps in performing a classic scientific experiment? - correct answer ✔✔1. Observation
2. Question
3. Hypothesis
4. Experiment
5. Analyze Data
6. Draw a Conclusion
What are the four hypothetical stages for the origin of life, how simple cells were created? - correct
answer ✔✔Stage I: Abiotic synthesis of small organic monomers can be spontaneously made from
atoms.
Stage II: The monomers join together to create polymers.
Stage III: The Formation of Pre-Cells make full cells by evolving.
Stage IV: Full cells have the origin or self-replicating molecules.
Biofilm: - correct answer ✔✔- Has strong layers of bacteria, protists, and fungi that live in a community.
- Very tough to treat with antibiotics.
Ex.) UTI, middle ear infection, & plastic retainers.
Eukaryotes - correct answer ✔✔- Nucleus: YES!
- Large & Complex
Prokaryotes: - correct answer ✔✔- Nucleus: NO.
, - Simple
Prokaryotic Reproduction - correct answer ✔✔- BINARY FISSION: organisms split into two
- Replication of the chromosome.
Shapes of Prokaryotic Cells: - correct answer ✔✔- Spherical (Cocci)
- Rod-Shaped (Bacilli)
- Spiral
What are the four main modes of nutrition for prokaryotes? - correct answer ✔✔1. Photoautotrophs
2. Chemoautotrophs
3. Photoheterotrophs
4. Chemoheterotrophs
PhotoAUTOtrophs: - correct answer ✔✔Use light energy to make their own food, synthesizing organic
compounds from CO2.
ChemoAUTOtrophs: - correct answer ✔✔Oxidize inorganic substances to get CO2, making food from
their own energy.
PhotoHETEROtrophs: - correct answer ✔✔Harness energy from light, but obtains carbon from organic
compounds.
ChemoHETEROtrophs - correct answer ✔✔Consume nutrients to produce energy and carbon.
What are the two main groups of prokaryotes? - correct answer ✔✔Archaea & Bacteria
Archaea: - correct answer ✔✔Thrive in extreme conditions.
Extremophiles - "Lovers of the extreme."
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