7 charcteristics of life
Download
Report
Transcript 7 charcteristics of life
– Biology is the study
of life and can be
used to both solve
societal problems and
explain aspects of our
daily lives.
Living things share the same 7 characteristics:
1.
2.
3.
4.
5.
6.
7.
Order (Organization of cells)
Response to a stimulus
Homeostasis (Regulation)
Metabolism (Energy processing)
Growth and Development
Reproduction
Change over time
(Evolutionary adaptation)
Mrs. Goch
Order (Organization of Cells)
Organization is the high degree of order within
an organism’s internal and external parts and in
its interactions with the living world.
Ex. owls and rocks- Which has more organization?
Why?
Order (Organization of Cells)
A cell is the smallest unit
of an organism that can
perform all life’s processes.
Unicellular organism
Multicellular organisms
are made up of many cells
and show a hierarchy of
organization going from
the organism to the atom.
Multicellular
organisms
Response to Environment
Another characteristic of
life is that an organism can
respond to a stimulus
A stimulus is a physical or
chemical change in the
internal or external
environment.
How is pupil dilation a response to stimuli?
Homeostasis(Regulation)
All living things have mechanisms
that allow them to maintain stable
internal conditions.
Homeostasis
is the maintenance
of a stable level of internal
conditions even though
environmental conditions are
constantly changing.
Why does a
dog pant?
How does maintaining a constant body temperature relate to homeostasis?
Metabolism (Energy
processing)
Metabolism is the sum of all the
chemical reactions that take in and
transform energy and materials from the
environment.
How does eating support metabolism?
Growth and Development
The growth of living things results from
the division and enlargement of cells.
Development is the process by which an
organism becomes a mature adult and cell
specialization occurs.
– It happens DURING a
SINGLE organism’s lifetime.
Reproduction
Living organisms pass on hereditary
information from parents to offspring, also
called reproduction.
Is reproduction
essential for life?
Change over time
(Evolutionary Adaptation)
Populations of living organisms evolve or change
through time over many generations.
Occurs through repeated reproductive success of one
variation in a species over others.
– DOES NOT OCCUR DURING ONE LIFETIME OR IN 1
ORGANISM
Explain how some animals
of the same species can
look so different,
such as these rabbits.