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25 Cards in this Set
- Front
- Back
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variable
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a factor that changes in an experiment in order to test a hypothesis
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classify
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the division of organisms into groups or classes based on specific characteristics
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dichotomous key
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an aid that is used to identify organisms and that consists of the answers to a series of questions
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diverse
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not alike but different
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cell
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the smallest functional and structural unit of living organisms
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tissue
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a group of similar cells that perform a common function
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organ
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a collection of tissues that carries out a specialized function of the body
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organism
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a living thing
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respiration
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the exchange of oxygen and carbon dioxide between living cells and their environment
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nucleus
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a membrane bound organelle that contains the cells DNA and has a role in processes such as growth, metabolism and reproduction
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membrane
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a wall that keeps the cell wall together
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gene
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one set of instructions for an inherited trait
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chromosome
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one structure in the nucleus made up of the DNA and protein
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trait
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a genetically determined characteristic
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dominant
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the trait observed in the first generation when parents that have different traits are bred
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recessive
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a trait that is apparent only when two recessive alleles are inhereted
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evolution
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process in which characteristics of a population change over generations
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natural selection
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the process by which individuals that are better adapted to their environment to reproduce and survive and are well adapted naturally
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adaptation
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a characteristic that improves an invididuals' ability to survive in a new environment
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selective breeding
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the human practice of breeding animals or plants to have certain traits
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symbiotic relationship
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when two animals help each other while one does not even realize the help
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producer
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an organism that makes things by themselves for better survival
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consumer
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organisms that eat things in order to survive
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biome
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a certain terrain characterized by temperatures, plants and animals
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respiration
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the exchange of oxygen and carbon dioxide between plants and humans
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