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Unit 2- Req. of Life

Unit 2- Requirements of Life

TermDefinition
Organism A living thing
Energy All living things must be able to create and use energy
Sun This is the primary energy source for living things on earth (directly or indirectly)
Water Living things need this liquid to survive
Waste The harmful leftovers from our metabolism that must be removed from the body.
Metabolism The sum of all chemical reactions in an organism.
Cells The building blocks of life, these make up all living things
Adjust Living things must deal with changes in their environment
Adaptations Traits that are inherited over long periods of time that help living things survive.
Stimulus / Stimuli Information gathered by your senses and processed by your brain about your surroundings
Reproduction All species of living things must reproduce in order to make sure their species survives.
Asexual reproduction Reproduction involving only 1 parent organism
Sexual reproduction Reproduction where two parent organisms combine their DNA
Life span Organisms are born, grow and develop, age, and die.
Birth The start of an organism's life span.
Growth The process of physically getting bigger.
Development The process of becoming more advanced and complex over time
Aging The process of growing old- results in an organism's body or cells no longer working correctly
Death The end of an organism's life span
Static Something that stays the same
Dynamic Something that changes
Equilibrium Something that is balanced or equal
Homeostasis Maintaining internal conditions at a constant level, even as conditions outside of the organism change (example: maintaining a specific internal temperature no matter how warm or cold it is outside)
Dynamic Equilibrium Another word for homeostasis. It means something that changes as it stays the same.
EWWCARL An acronym used to remember the 7 characteristics of living things
Locomotion the ability to move from place to place. NOT a requirement of life!
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