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.