Transcript Alive or not?

The Study of Life
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living
Things
Alive or not?
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Characteristics of Living Things

Living things are
made of cells.
The cell is the basic
unit of life.
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Characteristics of Living Things
All living things are
composed of one
or more cells
containing DNA
(the hereditary
material) that
function in an
organized way.
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Characteristics of Living Things
Living Things Display
Organization
Atoms form molecules,
groups of molecules form
cells, cells form tissues,
different tissues working
together form organs,
organs working together
form organ systems and
organ systems working
together to support an
organism.
 Structure fits function is
a major theme in
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biology.

Characteristics of Living Things

Living things grow
and develop.
Growth is the addition
of mass while
development is the
process of changes
that occur throughout
the life of an
organism.
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Characteristics of Living Things

Living things
reproduce.
Organisms reproduce and
pass along traits from one
generation to the next.
For a species to continue
to exist, reproduction
must occur.
Reproduction can be
asexual or sexual.
Characteristics of Living Things

Living things
respond to stimuli.
All organisms live in
constant interface
with environment: air,
water, weather,
temperature, other
organisms…
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Characteristics of Living
Things


Stimulus: condition
in the environment
that causes an
organism to adjust
Response: reaction
to a stimulus
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Characteristics of Living
Things



Living things maintain
homeostasis.
Many responses
organisms make are
internal regulations
make to maintain a
“steady state”
Homeostasis:
maintaining steady
state, takes energy.
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Characteristics of Living
Things

Living things require
energy.
 Energy is the ability to do
work and is required for
all life processes.
 Organisms get energy
from food.
 Plants, some Protists, and
some bacteria make their
own food in the process
of photosynthesis
(producers).
 Animals, fungi, some
Protists and some bacteria
need to consume food
(consumers).
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Characteristics of Living Things

In living things
adaptations evolve
over time.
Adaptations are inherited
changes that occur over
time to enable an
organism to respond to
stimuli and better survive
IN AN ENVIRONMENT.
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Characteristics of Living Things

Gradual accumulation
of adaptations over
time is EVOLUTION
Some organisms evolve
slowly (horse) while
others evolve within
our lifetime
(bacteria).
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