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Biology: the big ideas lesson 1.3b Life at every level Biology studies a wide range of living things: from small to huge. Biochemistry is the study of chemicals within living things Ecology is the study of the interaction of living things & their environment Levels of organization: largest Biosphere Ecosystem The part of Earth that contains all ecosystems Biosphere Community and its nonliving surroundings Hawk, snake, bison, prairie dog, grass, stream, rocks, air Community Populations that live together in a defined area Population Group of organisms of one type that live in the same area Hawk, snake, bison, prairie dog, grass Bison herd to smallest Organism Groups of Cells Individual living thing Bison Tissues, organs, and organ systems Nervous tissue Brain Nervous system Nerve cell Cells Molecules Smallest functional unit of life Groups of atoms; smallest unit of most chemical compounds Water DNA Whiteboard: what level to we belong to? The “big ideas” of biology Science is a way of knowing – Science is more than a collection of facts Nature is interdependent – Everything in nature interacts Matter & energy interact – Living things convert matter into energy to live Pair/share: what is an example of inter action not pictured here? Information and heredity – Life’s processes are directed by the information stored in the genetic code Unity and diversity – All living things are made up of the same molecules, yet are incredibly diverse The cellular basis of life – All life forms are made up of cells Evolution – Living things have changed over the history of the earth Structure and function – Living structures reflect their function Homeostasis – Living things use energy to maintain their internal environment P/S: how do birds wings help them fly? archaeopteryx Summary Today’s talk was about…………………. I already knew that…………………… I just learned about……………….. I’d like to learn more about………………….