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What are common characteristics of living things |
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Definition
Properties of life order, energy processing, regulation, growth and development, reproduction, response to environment, evolutionary adaptation |
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Definition
-Archaea and bacteria -few internal membranes -no membrane-bound nucleus |
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Definition
-Protists, Fungi, Animals, Plants -extensive internal membranes -membrane-bound nucleus |
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Definition
change of one form of energy to another |
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sum of chemical reactions in an organism |
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other feeder, taking in organic molecules produced by other organisms |
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using the energy of the sun to produce organic molecules |
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deoxyribonucleic acid (the molecules of heredity) |
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nuclear division retaining the original chromosome |
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nuclear division reducing the chromosome number, leading to sperm or eggs |
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change in characteristics |
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The steady state physiological condition of the body (living things maintain homeostasis=a relatively stable internal condition) |
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Darwins Theory of evolution 1. descent with modification |
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Definition
current species arose from a succession of ancestors |
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Darwin's Theory of evolution 2. Natural Selection |
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Definition
individuals with traits that provides an advantage in the current environment are more likely to survive and reproduce. |
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Definition
characteristic that promotes surival and reproduction |
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objective notations of phenomenon |
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Hypothesis (this is a Bio21 definition) |
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Definition
-Two measurable variables -Precise relationship between them (relationship=prediction) |
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How do Biologists study living things? |
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Definition
Testing hypotheses in a controlled experiment. |
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sample treated to test for effect of the factor being studied |
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sample treated like experimental in all ways EXCEPT for factor being studied |
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test designed to determine the effect of one factor while keeping all other factors constant |
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-experiments can be designed to test predications from the hypothesis -experimental results must be repeatable |
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-allows scientists to eliminate alternative hypotheses |
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hypothesis supported by repeated testing |
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Definition
theory that has been supported over a long period of time -cell principle -principle of evolution -principle of emergent properties |
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