Bio100 Midterm Study Guide

Topics: Cell, Bacteria, Photosynthesis Pages: 13 (3431 words) Published: April 22, 2013
7 properties of Life |Description/Examples | |
|Order |All living things exhibit complex but ordered organization; structure of a pinecone | |Regulation |The environment outside of the organism may change drastically, but the organism can adjust its internal | | |environment keeping it within appropriate limits; temperature (shivering and sweating) | |Growth & Development |Information carried by genes controls the growth and development in all organisms | |Energy Utilization |Organisms take in energy and use it to perform all of life’s activities; Puffin eating fish to have energy| | |to swim | |Response to the |All organisms respond to environmental stimuli; Venus fly trap shutting when a fly touches its hairs | |environment | | |Reproduction |Organisms reproduce their own kind; hippos only reproduce hippos | |Evolution |Reproduction underlies the capacity to evolve over time; a bug changes over time to camouflage to its | | |environment |

Levels of organization in the living world:
1. Biosphere
2. Ecosystem6. Organs-Organ Systems
3. Communities7. Tissues
4. Population8. Cells
5. Organism9. Organelles
10. Molecules and Atoms
Homeostasis- The steady state of body functioning; the tendency to maintain relatively constant conditions in the internal environment even when the external environment changes. Homeostasis is dependent on negative feedback to give it signals to regulate; when a thermostat recognizes the temp has dropped it cues the heater to kick on. In negative feedback, a change in a specific variable triggers a mechanism that will reverse the change.

Nutrients are recycled; water, minerals, carbon dioxide and decomposed organisms are used and recycled back in to the ecosystem Energy flows through; sunlight is used for photosynthesis which produces 02

Producers are photo synthesizers. Producers convert the sun’s energy to chemical energy of sugars and complex molecules. The sun enters as light and is converted to heat which is released back into the ecosystem.

Taxonomy- the branch of biology that identifies names and classifies species. Names are 2 parts (binomial), genus and species. Closely related species are grouped into a genus.

Prokaryotic and Eukaryotic Cells
|Characteristics |Prokaryotic Cells |Eukaryotic Cells | |Nucleus |No |Yes | |Cell Size |Very small |Larger | |Complexity (organelles) |Low complexity |Many | |Examples of organisms with these cells |Bacteria, archaea |Animals, humans, plants, fungus, protists |

Domain Characteristics- 3 domains
|Domains |Archaea |Bacteria |Eukarya | |Distinguishing |Exist in extreme conditions |No nucleus |Nucleus | |characteristics |No nucleus |Cell walls contain |Unique rRNA to Eukarya| | |Single celled |peptidoglycan |...
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