Ch. 1 Introduction to Biology 30
Characteristics of life
1. Composed of cells 2. Highly organized 3. Responds to the environment 4. Uses energy for growth and maintenance 5. Reproduces 6. Grows and develops 7. Adaption to environment
5 ways biology affects the world
1. Food 2. Clothing 3. Shelter 4. Health 5. Fuel
Levels of Organization
1. Molecular 2. Cellular 3. Tissue 4. Organ 5. Organ system 6. Population 7. Community 8. Ecosystem
Tissue
A group of cells organized to perform particular function
Species
A group of organisms so similar to one another that they can interbreed
Organism
A living thing
Community
Different species in the same location
Population
Group of organisms of the same species in a particular area
Biotic factors
Living ex. Grass
Abiotic factors
Non-living ex. Sunlight
Indirect food source
Product of the organism ex. Honey
Ecosystem
Organisms in an area as well as non-living factors of the environment
Biosphere
Parts of the earth that sustain life. Ex. Land
Organ system
Several different types of organs that function together for a specific purpose
Organ
Several different types of tissues that function together for a specific purpose
Cell
Smallest unit of life capable of carrying out all the functions of living things
Direct food source
Tissue of the organism ex. Carrot
Biotechnology
Use of organisms to produce things people need
