1 / 10

Evolution Descent with Modification Natural Selection

Explore the concepts of evolution, descent with modification, natural selection, and the scientific method in biology. Understand how these mechanisms contribute to the diversity and unity of life. Learn the importance of careful observation, hypothesis formation, experimentation, and the distinction between field observations and controlled experiments.

shelbyhamilton
Download Presentation

Evolution Descent with Modification Natural Selection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fig. 1.19 • Evolution • Descent with Modification • Natural Selection • Provides mechanism for better-adapted organisms to pass traits to next generation (doesn’t create adaptations) • Darwin: Cumulative changes in population over sufficiently long periods of time could produce new species from ancestral ones • Descent with Modification accounts for unity of life (common ancestor) • Natural Selection over time accounts for diversity of life

  2. Fig. 1.22

  3. Scientific Method • Process • Observation • Careful; Include as many parameters as possible • Observations  Induction  Hypothesis • Question • Hypothesis • Possible cause • Reflect past experience (educated guess) • Multiple (consider alternative explanations) • Testable • Falsifiable • Prediction • Hypothesis/Principle  Deduction  Prediction • Experiment • Experimental group, Control group, Replication • Results/Interpretation • Scientific Theory

  4. Fig. 1.24

  5. Fig. 1.25

  6. Fig. 1.26

  7. Fig. 1.27

  8. Scientific Method • Field Observations vs. Controlled Experiments • Field Observations (in situ) • Natural setting • Uncontrolled variables • Examples? • Controlled Experiment (usually ex situ) • Fewer uncontrolled variables • Test one or a few variable(s) at a time • Artificial setting (especially ex situ)

More Related