1. Characteristics of Life
Friday, November 30, 2018
Characteristics of Life
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

2. Characteristics of Life
Friday, November 30, 2018
Characteristics of Life
There is no one definition of life that is accepted by scientists.
However, life is defined by the properties and functions characteristic of living things
Life Functions {Properties of Life} are the various activities carried on by living things.
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

3. Properties of Life Order Reproduction Growth and Development
Friday, November 30, 2018
Properties of Life
Order
Reproduction
Growth and Development
Nutrition
Energy Utilization
Respiration
Response to Stimuli
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

4. Friday, November 30, 2018
Order
All other characteristics of life emerge from an organism’s complex organization
Made up of cells
A single cell can be an organism
Bacteria
Unicellular
Most organisms are multicellular
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

5. Energy Utilization Energy is used to grow, develop and reproduce
Friday, November 30, 2018
Energy Utilization
Energy is used to grow, develop and reproduce
Anabolism
Process in a living thing that involves putting things together, or synthesizing complex substances from simpler substances
Photosynthesis
Photo = Light
Synthesis = put together
Metabolism
Catabolism
Large to Small
Break apart
Anabolism
Small to Large
Put together
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

6. Energy Utilization #2 Catabolism Metabolism
Friday, November 30, 2018
Energy Utilization #2
Catabolism
Changing complex substances into simpler ones
Results in a release of energy
Can animals perform photosynthesis?
Metabolism
The total sum of all chemical reactions in the body
The balance of anabolism and catabolism
Metabolism
Catabolism
Large to Small
Break apart
Anabolism
Small to Large
Put together
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

7. Growth and Development
Friday, November 30, 2018
Growth and Development
Growth involves the increase in cell number and cell size
What growth spurt are you going through right now?
When does an organism stop growing/developing?
What tells our body that it is time for a cell to die?
How often do humans replace every cell in their body?
Growth-->Aging-->Death
How can you tell when a tree has died?
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

8. Friday, November 30, 2018
Reproduction
The sexual or asexual process by which organisms generate new individuals of the same kind.
Cellular
Asexual
The Cell Cycle
Mitosis
Sexual
Meiosis
Organism
Budding
Sexual Reproduction
Sex
2 Cells combining to produce the first cell of a new organism
Single organism that can reproduce without the aid of another
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

9. Organism Sexual Reproduction* Plants
Friday, November 30, 2018
Organism Sexual Reproduction* Plants
Dicotyledon
A type of flowering plant that contains both sperm and eggs
In order for these plants to reproduce, fertilization, via pollination, must occur.
There are two types of pollination
Self-pollination
Cross-pollination
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

10. Organism Sexual Reproduction *Plants
Fertilization
Self Pollination
Transfer of pollen (sperm) from an anther to a stigma of the same flower.
Friday, November 30, 2018
© Ryan Barrow 2012

11. Sexual Reproduction Plants
Fertilization
Cross Pollination
The transfer of pollen from an anther of the flower of one plant to a stigma of the flower of another plant.
Friday, November 30, 2018
© Ryan Barrow 2012

12. Response to Stimuli/Environment
Friday, November 30, 2018
Response to Stimuli/Environment
Involves behaviors, metabolism and growth
What are some environmental pressures that you, as a human, respond to?
Odors
Light
Sound
Temperature
Light, temperature, odor, sound, gravity, heat, water and pressure
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

13. Response to Stimuli/Environment II
Friday, November 30, 2018
Response to Stimuli/Environment II
Homeostasis
Process by which organisms respond to stimuli in ways that keep their body suitable for life
Refers to an organism’s ability to maintain a constant or stable condition
Regulation mechanism to maintain an organisms internal environment
Provides capacity to evolve--”micro-evolution”
How does the human body respond in a hot environment?
What household appliance provides a great example of homeostasis?
Friday, November 30, 2018
© Ryan Barrow 2012
© Ryan Barrow 2008

14. Review
Friday, November 30, 2018
© Ryan Barrow 2012

15. Review Properties of Life Order Energy Utilization Anabolism
Catabolism
Growth & Development
Reproduction
Organism
Sexual
Asexual
Cellular
Response to Stimuli
Friday, November 30, 2018
© Ryan Barrow 2012