Bio CK12 1.3 Scientific Theories

5. scientific investigation made under controlled conditions to test the validity of a hypothesis.
7. an explanation that always applies under the same circumstances; based on large volumes of evidence and no known exceptions.
9. theory first proposed by Charles Darwin stating that inherited traits of organisms change over time because organisms with beneficial traits survive longer and produce more offspring so their traits increase in frequency.
12. scientific theory that proposes that microorganisms are the cause of many diseases.

1. evolutionary process in which organisms best suited to their environment are more likely to survive and pass on their traits to future generations.
2. tentative explanation to a scientific question that can be tested.
3. theory that states all living things are made up of cells, all life functions occur within cells, and all cells come from pre-existing cells.
4. study of life.
6. an individual living thing.
8. broad explanation that is widely accepted because it is supported by a great deal of evidence.
10. Lung disease caused by a genus of bacterium called Mycobacterium.
11. a serious disease caused by Bacillus anthracis, a bacterium that forms spores; infection in humans most often involves the skin, gastrointestinal tract, or lungs.