Cells
Characteristics of living
things
All living things:
1) Obtain their energy through
food – plants manufacture
their own food through
photosynthesis (autotroph)
while animals obtain their
food by eating other things
(heterotroph)
Characteristics of living
things
2) Respire – breakdown and use of
the energy contained in foods
Characteristics of living
things
3) Respond to
their
environment –
plants turn
towards the sun,
animals can
move around to
obtain food and
avoid danger
Characteristics of living
things
4) Excrete – produce
and get rid of waste
5) Are able to repair
themselves
6) Grow and
reproduce
Characteristics of living
things
7) Have a limited life
span
The cell theory
1) All living things are
made up of one or
more cells.
2) The cell is the
simplest unit that
can carry out all life
processes.
3) All cells come from
pre-existing cells.
What is a cell?
• Cell: the basic
unit of life
• Each cell contains
smaller parts
called organelles
which have specific
functions within
the cell.
Cellular energy
• All cells use energy
• Cellular Respiration occurs in
animal cells in order for the organism to
break down food (glucose) into useable
energy (ATP)