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Ch. 2 Living things

Cell... The smallest functional and structural unit of all living organisms usually consists of a nucleus and a membrane.
Stimulus/ stimuli .. Anything that causes a reaction or change in an organism or any part of an organism.
Homeostasis.... The maintenance of a constant internal state in a changing environment.
Sexual reproduction... Reproduction in which the sex cells from two parents untie producing offspring that share traits from each parents.
Asexual reproduction .... Reproduction that does not involve the union of sex cells in which one parent produces offspring identical to itself.
Heredity.... The passing of genetic traits from parent to offspring.
Metabolism ..... The sum of all chemical processes that occur in an organism.
Producer.... An organism that can make its own food by using energy from its surroundings.
Consumer ..... An organism that eats other organisms or organic matter.
Decomposer .... An organism that gets energy by breaking down the remains of dead organisms or animals wastes and consuming or absorbing the nutrients.
Protein A molecule that is made up of amino acids and is needed to build and repair body structures and regulate processes in the body.
Carbohydrate A class of molecules that includes sugar, starches, and fiber contains carbon, hydrogen, and oxygen.
A fat molecule or a molecule that has similar properties examples include oils waxes and steroids.
Phospholipid A lipid that contains phosphorus and that is a structural component in cell membranes
ATP Adenosine TriPhoshate 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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