Biological Organization tutorialOrganization

The Characteristics of Life

MADE UP OF CELLS

Multi-cellular Uni-cellular MADE UP OF CELLS

RESPONDS TO A STIMULUS

TAKE IN/USE ENERGY

LIVING THINGS HAVE A METABOLISM Main Entry: me·tab·o·lism Pronunciation: m&-'ta-b&-"li-z&m Function: noun A balance between catabolism (breaking down products) & anabolism (creating new products)

LIVING THINGS MUST MAINTAIN HOMEOSTASIS HOMEOSTASIS Main Entry: ho·meo·sta·sis Pronunciation: "hO-mE-O-'stA-sis to maintain a stable state of body systems, keep a balance in health Ex. Blood sugar, Heart rate, breathing, blood cholesterol, weight

Blood sugar needs to maintain a Set Point. Think of it as Carrying Capacity for your body Normal value set point

Feedback Loops

Feedback Loops short videoLoops Negative feedback loops- responds to change returning to original state, or decreasing the rate at which the change is occurring. Trees take in CO2. As CO2 rises, they can take in more to reduce CO2 levels Positive feedback loops- responds to change by increasing rate the change is occurring. Ice melt in arctic-reduces reflection of heat energy, increase ice melt

Example of negative feedback Most body systems rely on negative feedbacks 4.5feedbacks

LIVING THINGS GROW & DEVELOP

LIVING ORGANISMS REPRODUCE placental budding fission

LIVING ORGANISMS REPRODUCE Main Entry: spe·cies Etymology: –Middle English, from Latin, appearance, organisms that live in the same area & can produce fertile young MULE- A CROSS BETWEEN A DONKEY & A HORSE NOT A TRUE SPECIES

ADAPTATION 2 species of fox

EVOLVE CHANGE OVER TIME