Cht 1 Flashcards
Properties of life
- highly ordered
- Require energy input
- Homeostatic
- Respond to stimuli
- Reproduce
- Grow (larger) and develop (new)
- Adapt (lifetime)and evolve (generations)
- Genes
Hierarchy of organization
Atoms. Molecules. Organelles. Cells. Tissues. Organs. Organ systems. Organism. Population. Community. Ecosystem. Biosphere.
Robert Hooke
First to observe and describe cells
Cork
1665
Anton can Leeuwenhoek
Made own microscope
Identified cells water. Blood. Semen.
1673
Matthias Schleiden & Theodore Schwann
Cell theory
1839
Cell theory
Fundamental units of structure
Fundamental units of function
All cells come from other cells
Cells contain genes
Prokaryotic cells
Smaller Less complex Lack membrane-bond organelles DNA floats free in cytosol Ex. Bacteria and archaea
Scientific method
Observation Question Hypothesis Prediction Experiment Conclusion
Inductive reasoning
Specific -> generalization
Deductive reasoning
General to specific
If. Then
Hypothesis
Very specific. For a particular experiment
Theories
Broad generalization
Laws
Single action. Math
Eukaryotic cells
Larger More complex Have membrane-bound organelles DNA contained inside the nucleus Ex. All other cells
Three domains of life
Bacteria
Archaea
Eukarya