organisms = living things
Post on 01-Mar-2022
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Characteristics of Living Things
Have a cellular organization
Contain similar chemicals
Use energy
Respond to their surroundings
Grow and develop
Reproduce
Cells•A cell is a basic unit of structure and function in
an organism
How many cells are in this picture?
Unicellular Multicellular
•Single celled organism.•Bacteria •Amoeba
•Organisms composed of many cells.
•These cells are specific and programmed for
specific jobs.
•Create genetic material
•DNA (deoxyribonucleic acid).
•The blueprint instructions for cells to
direct all activity.
•Cells in organisms use energy to function.
•The students in this photo are using energy to learn. Even on the cellular level that we can’t see!
•Clearly, this cat is responding to something that has scared it.
•All living things can respond to their environment
•A stimulus is what causes the organism to
react.
•A response is what action happens as a result of a stimulus.
•Living things can grow an develop.
•Development is the process of change that occurs during and organism life to produce a more complex
organism.
Spontaneous generation
The idea that life can come from a non-living
source.
This was a very popular idea during the time of
Francesco Redi.
He created a controlled experiment to test if spontaneous generation was real.
Redi’s Experiment
This is a controlled experiment.
What is the control group? What is the variable group?
Louis Pasteur
Wanted to re-test to see if spontaneous generation was true. (Most people still believed in it)
Pasteur’s Experiment
This is also a controlled experiment.
What is the control group? What is the variable group?
The Needs of Living Things
Food
Water
Living Space
Autotroph – make their own foodHeterotrph – must consume others
All organisms need water to
survive.
All organisms need a place to live –there is limited space on Earth.
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