Page 51 - Science Course 1 (Book 1)
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Mo2-L2a: What are the Characteristics of Life?
Characteristics of Life
Characteristics of Life
Characteristics Definition
Living things have specialized structures with specialized functions.
Organization Living things with more than one cell have a greater level of organiza-
tion because groups of cells function together.
Living things grow by increasing cell size and/or increasing cell
Growth and development number. Multicellular organisms develop as cells develop specialized
functions.
Reproduction Living things make more living things through the process of
reproduction.
Response to stimuli Living things adjust and respond to changes in their internal and
external environments.
Homeostasis Living things maintain a stable internal environment.
Living things use energy for all the processes they perform. Living
Use of Energy things get energy by making their own food, eating food, or
absorbing food.
SUMMARY
Key Concept What are the Characteristics of Life?
What characteristics do all
living things share? An organism has all the characteristics of life.
Unicellular organisms have specialized
structures, much like a house has rooms for different
activities.
Homeostasis enables
living things to maintain Sensor
a steady internal
environment.
Effector Integrator
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