Transcript 9CHAROFLIFE

CHARACTERISTICS OF
LIFE
• All organisms, no matter how
different from each other, share
certain features that are specific
only to living things (you saw this
with the lab we did!)
9 Characteristics of Life
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Energy
Development
Growth
Adapt
Reproduction
Cells
Homeostasis
React/respond to environment
Organization
“EDGAR CHRO”
ENERGY
• Organisms need
energy and they get it
in different ways:
– Heterotroph: get food
by eating others
– Autotroph: make their
own food
• The sun is the
ultimate source of
energy:
– Why?
DEVELOP
• Process by which an
organisms changes
into an adult.
• Be careful. Not the
same as evolve.
GROW
• Multicellular organisms grow or get bigger
as a result of cell division (more cells to
the body)
• A unicellular organism gets bigger but if it
undergoes cell division, it becomes two
organisms (reproduction)
ADAPT
• Organisms gain traits
or behaviors through
mutations that help
them survive better in
an environment. Not
all mutations result in
adaptations! Most
are harmful and
depend on the
environment (natural
selection)
REPRODUCTION
• Reproduction= Process
of organisms making
new organisms like
themselves
– HOW? Organisms transmit
hereditary information
(DNA) to their offspring
• Important for survival of
species, not individual
• Two types, but sexual
reproduction creates
variety which is important
for evolution
CELLS:
• All Organisms contain at
least one (unicellular) or
more (multicellular) cells.
• In multicellular
organisms, the cells do
different tasks to help the
organism survive
• Each cell can live on its
own because a cell can
perform the 9
characteristics of life!!!!!!!
• We have
100,000,000,000,000
cells
Homeostasis
• All organisms have the ability to maintain their conditions stable:
• Things that need to be maintained stable: temperature, blood
pressure, water, mineral concentration, pH levels, etc
• Example #1: Body temperature control
When body
temperature is
below 98.6 then
body shivers to
increase
temperature back
to 98.6.
When body
temperature is
too high, humans
sweat to
decrease body
temperature
The human body maintains a stable internal temperature of
98.6°F.
RESPOND
• Organisms respond to
their environment for
protection
Organization
• At molecular, cellular levels and at organism
level