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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The characteristics of living organisms

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The characteristics of living organisms

The characteristics of living organisms


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


The characteristics of living organisms

  • To be considered alive, an object must exhibit all of the characteristics of living things.

  • Not just a few. Remember there are nine characteristics all organisms have.


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)


The characteristics of living organisms

Autotroph


The characteristics of living organisms

Heterotroph


The characteristics of living organisms

Decomposer (heterotroph)


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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