1. Characteristics of Living Things
Section 1
Characteristics of Living Things
Living Things Have Cells
What Is a Cell? A cell is a membrane-covered structure that contains all of the materials necessary for life.
How Many Cells? Some organisms are made up of only one cell and some are made up of trillions of cells.
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2. Characteristics of Living Things
Section 1
Characteristics of Living Things
Living Things Sense and Respond to Change
Homeostasis The maintenance of a stable internal environment is called homeostasis.
Responding to External Change Organisms must respond to change in the external environment in order to maintain their homeostasis.
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3. Characteristics of Living Things
Section 1
Characteristics of Living Things
Living Things Reproduce
Having Offspring Organisms make other organisms similar to themselves. They do so in one of two ways: by sexual reproduction or by asexual reproduction.
Living Things Have DNA
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DNA in Cells The cells of all living things contain the molecule deoxyribonucleic acid, or DNA.
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4. Characteristics of Living Things
Section 1
Characteristics of Living Things
Living Things Use Energy
Energetic Organisms Organisms use energy to carry out the activities of life.
Living Things Grow and Develop
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Growing Up All living things, whether they are made of one cell or many cells, grow during periods of their lives.
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