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Characteristics/Needs of Life
Life Science
22
Science
7th Grade
10/01/2008

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Cards

Term
Growth
Definition
To increase in size
Term
Development
Definition
To increase in complexity
Term
Asexual Reproduction
Definition
A form of reproduction that requires only one parent and produces offspring that are genetically identical to the parent
Term
Sexual Reproduction
Definition
A form of reproduction that requires 2 parents and results in offspring that are a genetic combination of both parents
Term
Decomposer
Definition
A group of organisms that obtains energy by breaking down the nutrients in dead organisms
Term
Producer
Definition
Organisms that are capable of making their own food through photosynthesis or chemosynthesis
Term
Metabolism
Definition
The sum of all the chemical processes that occur in the body
Term
Photosynthesis
Definition
The process by which plants capture light energy from the sun and convert it into sugar
Term
Unicellular
Definition
An organism that consists of one cell and is capable of carrying out all of life processes
Term
Multicellular
Definition
An organism that is made of 2 or more cells working together to perform life's functions
Term
Habitat
Definition
The environment where an organism lives
Term
Niche
Definition
An organism's way of life and its relationships with its environment (its job or role within an ecosystem)
Term
Homeostasis
Definition
The maintenance of a stable internal environment
Term
Stimulus
Definition
Anything that affects the activity of an organism (causes a reaction)
Term
Response
Definition
A reaction to a stimulus.
Term
Consumer
Definition
An organism that obtains energy by eating other organisms
Term
Cell
Definition
A membrane-covered structure that is the smallest unit that can carry out life activities
Term
Cellular Respiration
Definition
The process by which organisms convert oxygen and the energy in food into usable energy molecules known as ATP
Term
DNA
Definition
Material inside a cell that carries instructions for making proteins and controls the passing of traits from parent to offspring
Term
Adaptation
Definition
A physical or behavioral characteristic that allows an organism to survive in its environment
Term
Life Span
Definition
The amount of time an organism is expected to live
Term
Organism
Definition
Anything that can independently carry out life processes
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