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| Organism's modification in structure, function, or behavior suitable to the environment. |
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| Smallest particle of an element that displays the properties of the element. |
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| Total number of species, the variability of their genes, and the communities in which they live. |
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| Scientific study of life. |
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| Zone of air, land, and water at the surface of the Earth in which living organisms are found. |
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| Smallest unit that displays the properties of life; always contains cytoplasm surrounded by a plasma membrane. |
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| Assemblage of populations interacting with one another within the same environment. |
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| Statement made following an experiment as to whether the results support the hypothesis. |
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| Sample that goes through all the steps of an experiment but lacks the factor or is not exposed to the factor being tested; a standard against which results of an experiment are checked. |
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| Total pattern of human behavior; includes technology and the arts, and depends upon the capacity to speak and transmit knowledge. |
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| Facts or pieces of information collected through observation and/or experimentation. |
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| Group of stages by which a zygote becomes an organism or by which an organism changes during its life span; includes puberty and aging, for example. |
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| The primary taxonomic group above the kingdom level; all living organisms may be placed in one of three domains. |
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| Biological community together with the associated abiotic environment; characterized by energy flow and chemical cycling. |
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| Descent of organisms from common ancestors with the development of genetic and phenotypic changes over time that make them more suited to the environment. |
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| Artificial situation devised to test a hypothesis. |
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| Value expected to change as a result of an experiment; represents the factor being tested by the experiment. |
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| Total disappearance of a species or higher group. |
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| Unit of heredity existing as alleles on the chromosomes; in diploid organisms, typically two alleles are inherited- one from each parent. |
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| Increase in the number of cells and/or the size of the cells. |
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| Maintenance of normal internal conditions in a cell or an organisms by means of self-regulating mechanisms. |
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| Supposition that is formulated after making an observation; it can be tested by obtaining more data, often by experimentation. |
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| Animal without a vertebral column or backbone. |
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| One of the categories used to classify organisms; the category above phylum. |
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| All of the chemical reactions that occur in a cell. |
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| Union of two or more atoms of the same element; also, the smallest part of a compound that retains the properties of the compound. |
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| Referring to organism composed of many cells; usually has organized tissues, organs, and organ systems. |
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| Alteration in chromosome structure or number and also an alteration in a gene due to a change in DNA composition. |
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| Combination of two or more different tissues performing a common function. |
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| Group of related organs working together. |
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| A process by which plants, algae, and some bacteria harvest the energy of the sun and convert it to chemical energy. |
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| Treatment that is an inactive substance administered as if it were a therapy in an experiment but that has no therapeutic value. |
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| Organisms of the same species occupying a certain area. |
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| Theory generally accepted by an overwhelming number of scientists; a law. |
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| To produce a new individual of the same type. |
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| Development of concepts about the natural world, often by using the scientific method. |
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| Process of attaining knowledge by making observations, testing hypotheses, and coming to conclusions. |
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| Concept supported by a broad range of observations, experiments, and conclusions. |
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| Group of similarly constructed organisms capable of interbreeding and producing fertile offspring; organisms that share a common gene pool. |
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| Number used in evaluating statistical data to show the range of error in the data. |
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| The science of study of the practical or industrial arts. |
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| Group exposed to the experimental variable in an experiment. |
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| Group of similar cells that perform a common function. |
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| An animal with a vertebral column. |
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