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The smallest unit of life


Anything that causes a reaction or change


The maintenance of a constant internal state in a changing environment

sexual reproduction

Reproduction which the sex cells from two parents unite producing offspring that share the traits of both parents

asexual reproduction

Reproduction that does not involve the union of sex cells and in which one parent produces offspring identically to itself


The passing of genetic traits from parent to offspring


The sum of all chemical processes that occur in an organism


An organism that an make its own food by using energy from its surroundings


An organism that eats other organisms or ogranic matter


An organism that gets energy by breaking down the remains of dead organisms


A molecule that is made up of amino acids and that is needed to build and repair body structures


A class of energy giving nutrients that includes sugars, starches and fiber


A type of biochemical that does not dissolve in water, fats and steriods


A lipid that contains phospherous and that is a structural component in cell membranes


Adenosine triphosphate, a molecule that acts as the main energy source for cell processes

nucleic acid

A molecule made up of subunits called nucleotides

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