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Key Characteristics of Living Things: The Essence of Life

Explore the defining features of living organisms, from cells and reproduction to genetic codes, growth, response to the environment, and evolution. Discover the intricate details that make all living things functional and adaptable.

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Key Characteristics of Living Things: The Essence of Life

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  1. Characteristics of Living Things

  2. What is a cell? • A collection of living matter enclosed by a barrier that separates the cell from its surrounding. Unicellular = one cell Multi-cellular = many cells

  3. Reproduction • Producing new organisms • Sexual reproduction= cells from 2 different parents unite to produce the first cell of the new organism. • Asexual reproduction= the new organism has a single parent

  4. Based on a Genetic code • The directions for inheritance are carried on DNA. • This genetic code determines the inherited traits of every organism on earth.

  5. Growth and Development - Single celled organisms simply grow in size - Multi-cellular organisms grow by development.

  6. Need for materials and energy • Metabolism = the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes

  7. Response to the environment • Organisms detect and respond to stimuli from their environment.

  8. Maintaining internal balance • Homeostasis = maintaining internal stability.

  9. Evolution • As the environment changes a group of organism will change to adapt through the passing of traits from one generation to the next generation

  10. All living things… • Are made up of units called cells • Reproduce • Are based on a universal genetic code • Grow and develop • Obtain and use materials and energy • Respond to the environment • Maintain a stable internal environment • As a group, living things change over time

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