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A View of Life Biology- Study of living things Level of biological hierarchy Cell Tissues Organs System Population Communities Ecosystem Biosphere Living things: Are organized (prior slide) Acquire materials and energy Energy Metabolism Photosynthesis homeostasis Living things: Respond – usually results in movement, ensures survival and carry on daily activities Reproduce and develop Reproduce genes Living things: Have adaptations – modifications that make an organism suited to its way of life Natural selection Species evolution Biosphere Energy Human population and the environment In ecosystems, the same nutrients keep cycling through populations and eventually becomes heat Preservation of ecosystems if of primary importance Biodiversity Total number and relative abundance of species, variability of genes and different ecosystems Classification of living things 3 domains Eukarya – eukaryotic Archaea - prokaryotic Bacteria – prokaryotic Kingdoms Protists – uni/multicellular, various nutrition Fungus – saprotrophs, molds, mushrooms Plant – multi, photosynthetic Animal – multi, heterotrophic Scientific process Observation Hypothesis Experiments/further observations prediction Experiment Experimental design Experimental variable – variable being tested Dependent variable – result or change that occurs Control Collecting of data Scientific process Conclusion Scientific theory Concepts that join together well-supported and related hypotheses Principle – theories that are generally accepted by an overwhelming number of scientists law