The characteristics of living organisms
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The characteristics of living organisms. All living things. are made of cells. have DNA obtain and use energy. Excrete wastes grow and develop. reproduce. respond to their environment. adapt to their environment. Maintain homeostasis.

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All living things
All living things

  • are made of cells.

  • have DNA

  • obtain and use energy.

  • Excrete wastes

  • grow and develop.

  • reproduce.

  • respond to their environment.

  • adapt to their environment.

  • Maintain homeostasis



All living things are made up of one or more cells
All living things are made up of one or more cells

  • The cell is the smallest unit of life.

    • Some cells are made up of a single cell (unicellular). Most are too small to see.

    • Most living organisms are made up of many cells (multicellular). These are the organisms that you can see.

      Both multicellular organisms and unicellular organisms share all the characteristics of life.


All living things have dna
All living things have DNA

  • DNA is a universal genetic code shared by all organisms


Obtain and use energy
Obtain and use energy

  • ALL forms of life get the energy they use from the sun. Directly or indirectly.

    Plants and bacteria can capture this energy directly. (autotrophs)

    Animals use food as a source of energy but the food that animals eat comes from plants or animals that eat plants. (heterotrophs)





Excrete wastes
Excrete Wastes

All organisms use and obtain energy and then get rid of waste products.


Grow and develop
Grow and develop

  • Most organisms grow into adult forms

    • Sometimes they grow and change greatly in size and appearance.

    • Some show little change as they grow.


Reproduce
Reproduce

  • Asexual Reproduction- one parent creates genetically identical offspring

  • Sexual Reproduction- two different parents contribute genetic material.


Respond to the environment
Respond to the environment

  • All multicellular and unicellular organisms respond to stimuli in their environment.

    • Stimuli- anything that causes a change in an organism.

    • Response- the reaction to a stimulus


Adapt to the environment
Adapt to the environment

  • All living things have the ability to adapt to a favorable environment where they are able to reproduce.

  • Adaptation- behavior or characteristic trait that helps a species survive.


Maintain homeostasis
Maintain Homeostasis

  • Living things maintain homeostasis.

    • Homeostasis- a stable internal environment

      • Ex: Humans are able to maintain a constant body temperature despite changes in the weather.


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