Whatmakes

something a living thing?

Canis lupis familiaris.

Biology:The study of life

Why is one living and the other is not?

Cells/Organization Cell-Smallest unit capable of all life functions

Unicellular- one cell ex. Bacteria

Multicellular- organism made of many cells

DNA/Heredity• Deoxyribonucleic acid - carries

the code for all organisms

Reproduction

Sexual reproduction - involves 2 parents

Is it essential for an individual to reproduce?

Asexual reproduction - involves a single parent

Grow and Develop

Organisms develop as they mature into adult organisms

Organisms grow as they produce MORE CELLS

Obtain and use Energy/Metabolism

Why do organisms need energy?

How do organisms obtain energy?

What reactions are going on in our body?

Metabolism = the total of all chemical reactions in an organism

Energy Use/Metabolism

• Autotrophs( plants) – use energy from the sun to make their own food “glucose”

• Heterotrophs- ingest food for energy

Where does all energy come from?

Energy/Metabolism Contd.

• Catabolism- The process of breaking down complex substances into simpler substances

• Release energy –Digestion

Energy/Metabolism cont.

• Anabolism- the process of building complex substances from simpler substances – Requires energy – Building up cells

How do humans do this?

Respond to Stimulus

• Light • Temperature • Odor • Sound • Pressure• Gravity • Heat • Water

Stimulus- anything that causes an organism to react

Evolution/Adaptation• Evolution- Groups of Organisms will change

over time in order to survive with changing environments

• Adaptation- characteristics that improves organisms ability to survive and reproduce

Homeostasis

Homeostasis- the ability of an organism to maintain its internal environment despite conditions in the external environment.

Human body temperature is………if body temperature rises, you sweat.if body temperature lowers, you shiver.

Giant tortoise- life span = 150 years

Limited Life Span

"It's older than the great pyramids, older than Stonehenge”

4,770-year-old "Methuselah" bristle-cone pine.

"When Christ walked the earth it was already 2,700 years old."

California, USA

Mayfly – life span = one day!

A Lesson in the Art of Enjoying Life!

http://www.youtube.com/watch?v=fFnAdeaoG74

Alive or Not?

Is a virus living?

1. Made up of one or more cells2. Have DNA3. Can reproduce4. Grow and develop5. Obtain and use energy6. Respond to their environment 7. Can change over time(evolve)8. Maintain Stable Internal environment 9. Limited life span

All Living things share these characteristics.