– BiologyBiology is the is the study of life and study of life and can be used to can be used to both solve societal both solve societal problems and problems and explain aspects of explain aspects of our daily lives.our daily lives.

Living things share the same 7 Living things share the same 7 characteristics:characteristics:

1. Order (Organization of cells)1. Order (Organization of cells)

2. Response to a stimulus 2. Response to a stimulus

3. Homeostasis (Regulation)3. Homeostasis (Regulation)

4. Metabolism (Energy processing)4. Metabolism (Energy processing)

5. Growth and Development5. Growth and Development

6. Reproduction6. Reproduction

7. Change over time 7. Change over time

(Evolutionary adaptation)(Evolutionary adaptation) Mrs. Goch

Order (Organization of Cells)Order (Organization of Cells)

Organization is the high degree of order Organization is the high degree of order within an organism’s internal and external within an organism’s internal and external parts and in its interactions with the living parts and in its interactions with the living world. world.

Ex. owls and rocks- Which has more Ex. owls and rocks- Which has more organization? Why?organization? Why?

Order (Organization of Cells)Order (Organization of Cells) A A cellcell is the smallest unit is the smallest unit

of an organism that can of an organism that can perform all life’s perform all life’s processes.processes.

MulticellularMulticellular organisms organisms are made up of many cells are made up of many cells and show a hierarchy of and show a hierarchy of organization going from organization going from the organism to the atom.the organism to the atom.

Unicellular organism

Multicellular organisms

Response to EnvironmentResponse to Environment

Another characteristic of Another characteristic of life is that an organism life is that an organism can respond to a can respond to a stimulusstimulus

A stimulus is a physical or A stimulus is a physical or chemical change in the chemical change in the internalinternal or or externalexternal environment.environment.

How is pupil dilation a response to stimuli?

Homeostasis(Regulation)Homeostasis(Regulation)

All living things have mechanisms All living things have mechanisms that allow them to maintain stable that allow them to maintain stable internalinternal conditions. conditions.

HomeostasisHomeostasis is the is the maintenance of a stable level maintenance of a stable level of internal conditions even of internal conditions even though environmental though environmental conditions are constantly conditions are constantly changing.changing.

Why does a dog pant?

How does maintaining a constant body temperature relate to How does maintaining a constant body temperature relate to homeostasis?homeostasis?

Metabolism (Energy Metabolism (Energy processing)processing)

MetabolismMetabolism is the sum of all the is the sum of all the chemical reactions that take in and chemical reactions that take in and transform transform energyenergy and materials and materials from the environment.from the environment.

How does eating support metabolism?How does eating support metabolism?

Growth and DevelopmentGrowth and Development

The growth of living things results The growth of living things results from the from the divisiondivision and and enlargementenlargement of cells.of cells.

DevelopmentDevelopment is the process by is the process by which an organism becomes a mature which an organism becomes a mature adult and cell specialization occurs.adult and cell specialization occurs.– It happens DURING a It happens DURING a

SINGLE organism’s lifetime. SINGLE organism’s lifetime.

ReproductionReproduction

Living organisms pass on Living organisms pass on hereditaryhereditary information from parents to information from parents to offspring, also called reproduction.offspring, also called reproduction.

Is reproduction Is reproduction

essential for life?essential for life?

Change over time Change over time (Evolutionary Adaptation)(Evolutionary Adaptation)

PopulationsPopulations of living organisms evolve or of living organisms evolve or changechange through time over many generations. through time over many generations.

Occurs through repeated reproductive success of Occurs through repeated reproductive success of one variation in a species over others.one variation in a species over others.– DOES NOT DOES NOT OCCUR DURING ONE LIFETIME OR OCCUR DURING ONE LIFETIME OR

IN 1 ORGANISMIN 1 ORGANISMExplain how some animals Explain how some animals

of the same species canof the same species can

look so different, look so different,

such as these rabbits.such as these rabbits.