Characteristics of Life Flashcards
(38 cards)
Characteristic 1
Levels of Organization
Levels of Organization
-Biosphere
-Ecosystem
-Community
-Population
-Organism
-Organ system
-Organ
-Tissue
-Cell
-Organelle
-Molecule
Ecosystem Definition
All living things in an area + all nonliving physical components of the environment
Community Definition
All living things in an ecosystem
Population Definition
All the individuals of a species in a specified area
Organism Definition
An individual living thing
Organ System Definition
Group of several organs that work together to perform a function
Organ Definition
Structure that carries out a specific function within the organ system
Tissue Definition
Group of similar cells that carry out specific funtion within an organ
Cell Definition
Lowest level at which life exists
Organelle Definition
Membrane-Bounded structure that carries out a specific function within a cell
Molecule Definition
Group of atoms held together by chemical bonds
Characteristic 2
Regulation (Homeostasis)
Regulation Definition
Maintain constant internal environment. EX: Feedback mechanisms
Characteristic 3
Response to Environment
Response to Environment Definition
Respond to stimuli from external environment
Characteristic 4
Energy Processing
Energy Processing Definition
Take in materials and use them to build and repair structures
Startegies for obtaining energy
Autotrophy, Heterotrophy
Autotroph
Use light / simple chemicals from environment to make food (glucose)
Heterotroph
Must obtain food from other organisms
Food Web Levels
Producer, Consumer, Decomposer
Producer
Provide food for rest of food web
Consumer
Eat producers or other consumers
