Bio NOTES: Characteristics of Life Anything that possesses all the characteristics of life is known as an organism. Characteristics of Life: 1.Made of cells 2.Reproduce 3.Based on a universal genetic code 4.Grow and develop 5.Obtain materials and energy 6.Respond to the environment 7.Maintain a stable internal environment 8.Change over time

Characteristics of Life: 1.All living things are made of _______ a. Cells: the most basic unit of organisms b. Cells: smallest unit that can carry on ALL cellular activities ____________ made of only one cell (bacteria) ____________ composed of many cells (trees, humans) * This allows cells to become much more specialized Organism Groups of Cells Molecules Individual living thing Tissues, organs, and organ systems Smallest functional unit of life Groups of atoms; smallest unit of most chemical compounds Bison Nervous tissue Nervous system Brain Nerve cell Water DNA Cells  Tissues  Organs  Organ Systems  Organism cells Unicellular Multicellular

2. All living things ____________ a. ___________________: a single organism can reproduce without the aid of another organism. (bacteria) b. ___________________: requires two cells from different organisms to produce a new cell and thus a new organism 3.All living things are based on a ____________________ a. DNA! reproduce Asexual reproduction Sexual reproduction universal genetic code Asexual Sexual 4.All living things___________________________ a. Growth: occurs through _________________ and enlargement b. Development: changes on the way to ____________ and cell repair/replacement grow and develop cell division adulthood 5.All living things obtain _______________________ -- EAT! materials and energy

6.All living things ______________ to the environment a. ____________ : Any condition that requires an organism to adjust ex) cold weather b. ____________ : The reaction to the stimulus ex) bear begins to search for a den c. __________ : Complex set of responses that increases an organisms chance of survival ex) bear prepares a den, eats as much as possible… respond Stimulus Behavior Response 7.All living things maintain a _________ internal environment a. ______________: the process by which organisms respond to stimuli and keep their internal conditions constant for life. ex) shivering in response to cold stable Homeostasis 8.Groups of organisms ___________________over time a. _______________: Any change in an organism that makes it better suited to its environment. change/evolve Adaptation

FRED CHEG! Food R eproduce Evolve D evelop Cells Homeostasis Environment Genetic code

Viruses Viruses are NOT considered alive because they can not reproduce on their own. They must use cells from other organisms to reproduce

New Vocab Biotic-living Abiotic-non living