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24 Cards in this Set
- Front
- Back
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scientific method |
-approach to answer questions -objective observation -hypothesis formulation -hypothesis testing by experimentation -analysis and conclusions |
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Indepedent variable |
on x axis |
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dependent variable |
on y axis |
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null hypothesis |
states that X has no effect on Y |
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hypothesis testing by experimentation |
-experimental variable - -independent and dependent control group -control oustside variable
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evolution |
-change in the genetic make up of a population over time |
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population |
-is a group of cospecies (members of same species) tha tlive inteh same geographic area and interbreed |
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to be members of same species have to |
-be able to interbreed and produce fertile offspring |
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natural selection |
-main mechanism that drives evolution -process in which individuals with certain traits survive and reproduce at higher rates than individuals lacking those traits |
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adaptations |
-inherited traits that enhance survival and reproduction in a specific environment |
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speciation |
-when populations are reproductively isolated from one another over long spans of time it is possible that the population diverge, becoming so genetically different thtat they cant reproduce |
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organic |
-the molecules are based on chiains or rings of carbon atoms |
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macromolecules |
-large molecule -the molecule has high molecule weight -usually used to describe polymers whihc biomolecules comprise the structure and function of life |
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carbs |
sugars and starches |
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lipids |
-fats, waxes, oils, steroids |
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proteins |
structural molecules and enzymes |
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nucleic acids |
DNA, RNA, ATP |
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monomers |
-single units -may eist on their own or a part of a polymer |
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polymer |
-long molecule consisting of many similar of identical building blocks(monomers) linked by covalent bonds |
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covalent bonds that joins monomers |
-is formed through a reaction called dehydration or condensation |
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dehydration |
-water lost -removal of two hydrogen atoms and an oxygen atom between two molecules |
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hydrolysis |
-opposite of dehydration -breaks the covalent bond between two monmers by addeing a water |
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general chemical formula for carbs |
-(CH2O)lil n |
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lil n |
can be any number |
