5 Characteristics of Life (CHRMD)
[Pages:9]Characteristics of Life
Essential Questions
1. List and explain each of the five characteristics of life.
2. Describe how you could tell if an unknown object is living.
The 5 Characteristics of Life
? If something is living it must
have ALL 5 of
the following characteristics!!!
? Cells ? Homeostasis ? Reproduction ? Metabolism ? DNA/Heredity
CELLS=
Basic Unit of Life ? Living things have one or more.
? Usually very small
? Use a microscope to view
? What is the largest single cell?
Homeostasis = The maintenance of a relatively
stable internal environment.
? Examples: Body temp., oxygen level, blood sugar level, pH, water level.
Reproduction = The ability to form a new offspring.
Can be sexual or asexual.
Sexual Reproduction ? 2 organisms combining genetic material for new offspring.
Asexual Reproduction ? 1 individual providing exact copy of genetic material.
Metabolism = The ability to obtain and use energy for
growth and movement
Examples: Cellular Respiration, Photosynthesis
How do you know? If it grows or causes movement.
DNA/Heredity = Genetic material that is passed on
during reproduction.
? DNA & RNA tell each cell what and how to make proteins.
? How do you know if it has DNA?
? Use a microscope
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