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Biology 105 Unit 1: Biology a view of Life Pgs 1-19 Student Outcomes Distinguish nonliving. between the living and Describe the levels of biological organization from smallest to largest. Compare life. and contrast the 3 domains of Student Outcomes Give a brief overview of the relationship between evolution and biology. Describe the flow of energy through ecosystems. Understand and Perform steps of the scientific method. Key Terms Prokaryote Eukaryote Homeostasis Stimulus Adaptation Biosphere Theory Evolution Classification Heterotroph Binomial Nomenclature Natural Selection Metabolism Response Taxonomy Hypothesis Autotroph Mutation Science In Latin means to know or to discover Based on Direct Observations and a Testable Hypothesis Measureable Not a ‘belief’ Living vs Nonliving Organisms…. Are composed of cells Grow and Develop Perform and regulate chemical activities Respond to stimuli Reproduce Evolve and adapt to the environment Levels of Organization (smallest to largest) Atoms - _____________ Molecules - _____________ Cells - _______________ Tissues - _____________ Organs - ______________ Organ Systems - _____________ Organism - ________________ Levels of Organization (smallest to largest) Population Community Ecosystem Biosphere Systematics (study of diversity and relationships of organisms) * Domain Kingdom Phylum Class Order Family Genus Species Domains Eubacteria Archaea Eukarya - (Eukaryotes) Kingdoms Eubacteria - bacteria Archaea - Archaebacteria Eukarya - Animalia, Fungi, Plantae, Protista Major Themes Evolution over time - Populations will change ‘evolve’ Information Transfer-cells must communicate with each other and from parent to offspring. Energy energy For Life - continuous supply of Species evolve Natural selection drives the evolution of organisms (finches, pests, superbugs) Darwin’s Origin of Species in 1859 Variations New by mutations discoveries in genetics have given support to the evolution theory Energy Pyramid Producers Consumers Decomposers Energy Pyramid Producers - Autotrophs - Photosynthesis Consumers/Decomposers - Heterotrophs Primary consumers - Herbivores Secondary consumers - carnivores Teritiary consumers - carnivores (What would a venus fly trap be???) Energy Pyramid What supplies the initial energy? Where is energy converted? When/Where is energy lost? What happens when an organisms dies? Scientific Method Problem/Question Research Hypothesis Experiment Data Gathering and Analyzing Conclusion Scientific Method cont. After experiment is repeated, then publish findings and limitations. Experiment and findings must be supported by others-Peer Review Hypothesis Two Types Null Hypothesis Directional Hypothesis Hypotheses (see next slide first) Effect music has on the growth of plants. Effect music has on a person’s ability to retain information while studying. Effect music has on 17 year olds ability to retain information while studying. Effect music has on 17 year old males ability to retain information while studying. Experiment Must include a control for comparison Must be appropriate sample size Must be repeatable Two types of variables: IV-independent variable DV-dependent variable Avoiding bias Blind study Double blind study Data Must Use be recorded unbiased standard deviation to determine if data from the variable is statistically different. Conclusion Not important if hypothesis is correct or not. Information learned about the question is what is important!!! Science Theories The longer a theory exists in time and/or the more effort to prove it false the stronger the theory becomes.