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Biology: Understanding Life

Biology: Understanding Life. Galactic Real Estate In The News. Insert video clip. Biology = The Study of Life. Subdisciplines of Biology. Molecular – chemical level Cell – individual cell level Organismal – individual level Population – species level Many other fields of study.

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Biology: Understanding Life

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  1. Biology: Understanding Life

  2. Galactic Real EstateIn The News Insert video clip

  3. Biology = The Study of Life

  4. Subdisciplines of Biology • Molecular – chemical level • Cell – individual cell level • Organismal – individual level • Population – species level • Many other fields of study

  5. What is Life? • Living Organisms share common characters

  6. Characteristics of Life • Cellular composition and hierarchical organization • Interaction with one another and the environment • Emergent properties (organization yields characteristics) • DNA directs structure & function, is heritable • Transformation of energy & maintenance of stability • Form that fits function • Diversity in type with pattern unity among organisms • Evolution of species from Table 1.1

  7. Life is Embodied by the idea that the whole is equal to more than the sum of its parts

  8. All Living Things are Composed of Cells • Cell • Mass of protoplasm • Bound by membrane • Smallest living unit

  9. Organization of Life • Cell • Tissue • Organ • Organ System • Organism • Population • Community • Ecosystem • biosphere Smallest Level Largest Level

  10. Biological Information • DNA (deoxyribonucleic acid) • Recipe for structure & function • Material of heredity

  11. Organisms Use & Transform Energy • Energy drives activities • Movement • Cell repair • Reproduction • Growth • Homeostasis

  12. Source of Energy • Photosynthesis • Capturing energy from the sun • Organisms that can do this are producers • Feeding on Producers • Capturing energy from another organism • Organisms that can do this are consumers • Break down molecules of dead organisms • Recycle nutrients • Organisms that do this are decomposers

  13. Structures Fit Functions • Form infers function • Example: feathers • Fluffy = insulator • Flight feathers • Waterproof feathers • Camouflage feathers

  14. Different form, different function

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