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| Any difference between individuals of the same species. |
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| The theory that evolution occurs slowly but steadily. |
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| Term used to indicate a species that does not have any living members. |
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| A technique used to determine the actual age of a fossil on the basis of the amount of a radioactive element it contains. |
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| The preserved remains or traces of an organism that lived in the past. |
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| The set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait. |
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| The gradual change in a species over time. |
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| Body parts that are structurally similar in related species; provide evidence that the structures were inherited from a common ancestor. |
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| A diagram that shows how scientists think different groups of organisms are related. |
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| The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species. |
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| The theory that species evolve during short periods of rapid change. |
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| The process of using one or more of your senses to gather information. |
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| The process of making an inference, an interpretation based on observations and prior knowledge. |
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| An observation that deals with characteristics that cannot be expressed in numbers. |
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| An observation that deals with a number or amount. |
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| The mistaken idea that living things arise from nonliving sources. |
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| The stage of the cell cycle during which the cell’s nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell. |
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| The ongoing process of discovery in science; the diverse ways in which scientists study the natural world and propose explanations based on evidence they gather. |
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| The process of forecasting what will happen in the future based on past experience or evidence. |
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| The process of grouping together items that are alike in some way. |
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| A person who is trained to use both technological and scientific knowledge to solve practical problems. |
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| The struggle between organisms to survive as they attempt to use the same limited resource. |
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| All the different populations that live together in an area. |
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| The specific environment in which an animal lives. |
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| A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce. |
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| All the members of one species in a particular area. |
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| The number of births in a population in a certain amount of time. |
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| The number of deaths in a population in a certain amount of time. |
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| A trait that helps an organism survive and reproduce. |
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| A living part of an organism’s habitat. |
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| The maintenance of stable internal conditions. |
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| Two or more elements that are chemically combined. |
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| An organism that makes its own food. |
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| The process by which a cell makes a copy of the DNA in its nucleus. |
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| A nonliving part of an organism’s habitat. |
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| An organism that provides a source of energy or a suitable environment for a virus or another organism to live. |
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| An organism that lives inside or on another organism and takes food from the organism in or on which it lives. |
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| A close relationship between two species that benefits at least one of the species. |
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| The process by which molecules move from an area of higher concentration to an area of lower concentration. |
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| The regular sequence of growth and division that cells undergo. |
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| The stage of the cell cycle that takes place before cell division occurs. |
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| An environmental factor that causes a population to decrease. |
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| The final stage of the cell cycle, in which the cell‘s cytoplasm divides, distributing the organelles into each of the two new cells. |
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| The diffusion of water molecules through a selectively permeable membrane. |
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| The movement of materials through a cell membrane without using energy. |
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| A protein that speeds up chemical reactions in the body. |
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| The scientific study of how living things are classified. |
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| The process by which cells break down molecules to release energy without using oxygen. |
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| A chart or “family tree” that tracks which members of a family have a particular trait. |
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| In the 1600s, Italian doctor Francesco Redi designed a controlled experiment to show that flies do not arise from decaying meat. In Redi’s experiment, the manipulated variable was whether or not the jar was covered. Flies were able to enter the uncovered jar and lay their eggs on the meat. The eggs hatched into maggots. The flies could not enter the covered jar. Therefore, no maggots formed. Redi concluded that rotting meat does not produce flies. |
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| The formal name that scientists give to life forms and things that occur within nature. It is also often referred to as binomial nomenclature. |
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| one of two identical strands into which a chromosome splits during mitosis |
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| A natural process that occurs in all living organisms that copies their individual DNA. The process uses a the original double stranded DNA as a template for the production of more DNA. |
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