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Understanding Life: The Science of Biology

Explore the study of life with biology, discovering what it means to be alive, the characteristics of living organisms, and the diversity of life forms. Discover the wonders of biology through cells, reproduction, genetic code, growth, energy usage, and evolution.

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Understanding Life: The Science of Biology

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  1. 1-3 Studying Life BIOLOGY “bio”–life “logy”–the study of Biology is the science that seeks to understand the living world. What does it mean to be alive?

  2. Characteristics of Life • Living things are made up of cells • Smallest units of an organism that is considered alive • Can be unicellular (bacteria) or multicellular (humans)

  3. Characteristics of Life • Living things reproduce • Final product of reproduction = new organism • Asexual: OFFSPRING IS A CLONE OF THE PARENT • Sexual: OFFSPRING IS GENETICALLY DIFERENT FROM THE PARENT

  4. Characteristics of Life • Living things are based on a universal genetic code • DNA (Deoxyribonucleic Acid)

  5. Characteristics of Life • Living things grow and develop • Growth: an increase in size of an organism • Development: Egg to tadpole to frog

  6. Characteristics of Life • Living things obtain and use energy • Metabolism: chemical reactions occurring in an organism.

  7. Characteristics of Living Things • Living things respond to environment ex. Find shelter ex. Hibernating • Living things maintain a stable internal environment • Homeostasis: keeping internal condition stablerelative to the external environment

  8. Characteristics of Living Things • Living things evolve

  9. Reproduce Made of Cells The Characteristics of Life Obtain and Use Materials and Energy Based on a Universal Genetic Code Change over time Grow and Develop Maintain a stable internal environment Respond to their Environment

  10. Is Yeast Alive? How do you know? Paleontology

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