Name
Date
Class
Lesson Outline
LESSON 1
Characteristics of Life
A. Characteristics of Life
1. In order to be considered _____________________, something must exhibit 6 characteristics.
2. If it missing even one of them, it is ___________ considered alive.
3. Things that have all the characteristics of life are called ____________________.
B. Organization
1. All living things are made of ___________________.
2. An organism is ________________________ if it is made of one cell. Many unicellular organisms
can live together in a ______________________.
3. A ______________________ organism is composed of two or more cells that
___________________ _________________________.
4. All cells have special ____________________ that do specific ___________________.
5. Cells also exhibit organization when many cells ___________________
__________________________.
C. Growth and Development
1. Growth occurs when the ________________ of a cell increases, or when the _________________of
cells in an organism increases.
2. Development occurs when an organism experiences ______________________ throughout its
lifetime, such as a ___________________ turning into a __________________.
D. Reproduction
1.
more new organisms.
is the process by which one organism makes one or
2. Some organisms must have a(n)
others can reproduce without one.
to reproduce, but
E. Responses to Stimuli
1. All living things respond to changes in the environment called stimuli.
2. There are two types of stimuli:
a. ________________________stimuli are changes within an organism. Example: you feel
_________________, so you seek out __________________.
b. _________________stimuli are changes in an organism’s environment. Example: plants
_________________ toward the __________________
Name
Date
Lesson Outline continued
Class _______________
F. Homeostasis
1. An organism’s ability to maintain steady internal conditions when outside
conditions change is called
. Maintaining these
conditions ensures that cells can
2. Other methods of homeostasis include:
.
a. When our body ________________________ to cool us off or _____________________ to warm
us up.
b. When you eat too much __________________, your cells retain _________________ to dilute it.
c. Contractile vacuoles are cellular structures that help maintain homeostasis by pumping excess
_______________________ from the cell.
3. There is a ____________________ to the amount of change that can occur within an organism: You
cannot ___________________ in water below 50 degrees for more than a few ________________.
G. Energy
1. Cells continuously use
new cells, and perform chemical reactions.
to transport substances, make
2. For most organisms, the energy they use originally came to Earth from
the
.