1. Characteristics of Living Things
Organism = any living thing
-bacteria
-hippopotamus
-you!!!
CREDGREW (Mnemonic Device)

2. CREDGREW
C = Cells!!! All living things are made up of cells.

3. CREDGREW C = Cells!!! All living things are made up of cells.
Unicellular = single celled organism

4. Unicellular organism = single celled

5. CREDGREW C = Cells!!! All living things are made up of cells.
Unicellular = single celled organism
Multicellular = organism with many cells

6. CREDGREW C = Cells!!! All living things are made up of cells.
Unicellular = single celled organism
Multicellular = organism with many cells
Prokaryotic = type of cell; very simple; evolved early; no nucleus

7. Prokaryotic cell = simple cell; no nucleus; evolved first
Example = Bacterial cell

8. CREDGREW C = Cells!!! All living things are made up of cells.
Unicellular = single celled organism
Multicellular = organism with many cells
Prokaryotic = type of cell; very simple; evolved early; no nucleus
Eukaryotic = type of cell; complex; evolved later; contains nucleus and other organelles

9. Eukaryotic cell = more complex; evolved later; contains a nucleus (and many other organelles)
Example = corn cell

10. CREDGREW R = Reproduction; All organisms reproduce
Asexual reproduction - one parent
Sexual reproduction - two parents

11. CREDGREW
E = Energy; All organisms use energy from “food”; this is usually in the form of glucose (a sugar)
Autotroph = an organism that makes it’s own food using the sun; also known as a “producer”; examples are plants and algae
Heterotroph = get food from other organisms; also known as a “consumer”

12. CREDGREW
D = DNA (Deoxyribonucleic acid); all cells contain DNA; DNA is the chemical that genes are made of
Double helix

13. CREDGREW
D = DNA; all cells contain DNA; DNA is the chemical that genes are made of
G = Grow; all organisms grow

14. CREDGREW
D = DNA; all cells contain DNA; DNA is the chemical that genes are made of
G = Grow; all organisms grow
R = Response; all organisms respond to stimuli
(anything in an organism’s environment that causes it to react)

15. CREDGREW
D = DNA; all cells contain DNA; DNA is the chemical that genes are made of
G = Grow; all organisms grow
R = Response; all organisms respond to stimuli
E = Exchange; all organisms exchange gasses; take in CO2 and let out O2

16. CREDGREW
E = Exchange; all organisms exchange gasses; take in CO2 and let out O2
W = Waste; all organisms produce waste
Examples: CO2, ammonia, undigested food