Excuse me, are you alive?

1
"Excuse me, are you alive?"
2
Aim What are the characteristics of living
things?
I. Organism a whole living thing that carries
out life functions.
A. All organisms carry out the following life
functions
1. Nutrition the activities by which living
things obtain food and process it for their use.
a. Autotrophic nutrition organisms (green
plants) make their own food (photosynthesis)
b. Heterotrophic nutrition organisms must
obtain their foods from outside sources (ingest
food) of organic nutrients.
3
Autotroph
Heterotroph
4
2. Transport the life function by which
substances are absorbed, circulated, and released
by living things.
3. Respiration the life function by which
living things convert the energy organic foods
into a form more easily used by the cell.
4. Excretion - the life function by which living
things eliminate metabolic wastes from their
cells.
Metabolism the sum total of all the cells
chemical activity.
5
(No Transcript)
6
5. Synthesis involves the chemical processes of
building large molecules from smaller molecules.
6. Regulation - the life function by which living
things respond to changes within and around them,
and by which all life processes are coordinated.
7. Growth A process in which cells increase in
number and size, resulting in an increase in size
of the organism.
8. Reproduction The life process by which new
cells arise from preexisting cells by cell
division.
7
(No Transcript)