1. 7 Characteristics of Living Things

2. All living things are made up of at least one cell
COMPOSED OF CELLS
All living things are made up of at least one cell
Cell –
Basic or smallest unit
of life
Membrane bound structure in which all life processes are carried out

3. CELLS All organisms are organized at the cellular level
This organization enables organisms to carry out important life processes.

4. REACT AND RESPOND TO STIMULI
Stimulus – is anything that may cause an organism to react - Loud noises, hunger
Response - the reaction to something in the environment - Run/cover ears, Eat/hunt for food

5. Environment – All the surroundings of an organism
Homeostasis – maintaining a stable internal environment
Adaptation –
Change in traits over time that help an organism survive better in an environment; inheritable changes

6. REPRODUCE
·  Asexual – single parent produces offspring identical to parent
·  Sexual – 2 parents produce unique offspring having characteristics or traits of each parent

7. Contain DNA Deoxyribonucleic Acid
Genetic material that contains the “blueprints” for each organism
Provides directions for the making of proteins

8. OBTAIN & USE ENERGY
Required to carry out life processes- making and breaking down food, movement of materials and building of cells
Metabolism – the sum of all the chemical processes in an organism

9. METABOLISM The Sum of All Biochemical Processes
Obtain Nutrition
Sun is the source of
most energy
Producers - Make food
Consumers - Eat
Decomposers – Absorb
2. Digestion – Break down of large food particles into smaller pieces

10. Respiration – Mixing food with oxygen (O2) to release energy
Food + O H2O + Waste
Energy
Synthesis – Process of putting together or building up
Making more cells – Growth
Repair of Replace old cells
Excretion – removal of wastes

11. GROWTH & DEVELOPMENT GROWTH – the increase in size of an organism
Surface to volume ratio limits how large a cell can grow

12. Growth in Single-Celled Organisms
In single-celled organisms growth occurs by an increase in cell size
Cell can either stay big or divide

13. Growth in Multi-celled Organisms
In multi-celled organisms growth occurs by production of new cells
·   Increases the total number of cells in the organism
·   Increases total surface to volume ratio

14. Surface to Volume
Volume
Surface area
Volume
O2 , Food
H2O
Wastes

15. DEVELOPMENT
Development – All the changes an organism undergoes as it grows and matures 
·  Newborn puppies can’t see at birth
·   Human babies develop the ability to speak and walk

16. LIFE SPAN
All organisms, and individual cells, have a specific life span
Includes: Birth Death
Stages in Human Life Cycle
Birth  Infancy  Childhood  Adolescence  Adulthood 
Advanced Adulthood  Death

17. 4 Basic Needs of All Living Things

18. Food Needed to provide Energy to carry out life processes
Ultimate source of energy is the sun
Can get food as a producer, consumer or decomposer
Provides raw materials for growth and repair

19. Water Cells contain ~70% water
·   Needed to release energy in food and for other biochemical reactions
·   Required for transporting materials throughout organism
·  Helps with dissolving or diluting waste products

20. Air or Gases
·   Carbon Dioxide (CO2) required for photosynthesis - converting of energy from sun into food (glucose) organisms can use
·   Oxygen (O2) required for respiration- releasing of energy from food (glucose) into energy organism can use
·   Other gases are needed in smaller amounts for various life processes; not required by all organisms

21. Environment Biotic - living parts; other organisms that
meet all 7 characteristics
Living things may have to compete for their living space
Abiotic-non-living parts; physical features such as air, water, temperature (climate)
Must contain all the needs for that organism to survive

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