BIOB 110cs 1st edition Lecture 1 Current Lecture Plants have a different sense of time distance and size than humans do I Time a Plants undergo geologic and evolutionary changes in their long lives yet II respond to stress rapidly b They also can also be annual or perennials c Plants follow both Diurnal and Circadian daily rhythms Distance a They can respond on a cellular level but also have to travel greater distances for seed dispersal III Size a Can be as small as protons or as big as a redwood So what is a plant They are made up of many cells Cells walls are mainly made of cellulose They have chlorophyll They are photosynthetic They are adapted to life on land or descended from land plants Why do we study plants I Plants are the only source of oxygen they turn our carbon dioxide back into II oxygen They provide us with many things we need to survive such as food fiber fuel III and building materials For ecology Science and Society we form opinions and make decisions based on these We take recommendations from individuals Advertising can push us to believe or purchase something Economics Peer pressure Past experience The Scientific Method the way we should form opinions and make decisions I First make observations II Form a hypothesis an educated guess about what you think will happen III Do an experiment to test this hypothesis IV Analyze the results and determine whether or not hypothesis was correct Scientific proofs are not very common It is important to test multiple times to test for variation Statistical Terminology Standard Deviation measures how much replicate data differs from the mean Statistical Significance probability that a treatment effect if real usually 95 ANOVA Analysis of Variance a mathematical process that partitions differences in treatment effects vs random variability How do scientist research I They need money and it comes from government agencies state programs or II private companies and foundations Who gets the money from the funder Researchers submit proposals to obtain III this money and they need to be peer reviewed What happens with the results Their discoveries are published in peer review journals they collaborate with others and develop applications for their findings
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