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

Biosphere Ecosystem Community Population The part of Earth that contains all ecosystems Community and its nonliving surroundings Populations that live together in a defined area Group of organisms of one type that live in the same area Biosphere Hawk, snake, bison, prairie dog, grass, stream, rocks, air Hawk, snake, bison, prairie dog, grass Bison herd Levels of organization: largest

Organism Groups of Cells Molecules Individual living thing Tissues, organs, and organ systems Smallest functional unit of life Groups of atoms; smallest unit of most chemical compounds Bison Nervous tissue Nervous system Brain Nerve cell Water DNA to smallest 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 archaeopteryx P/S: how do birds wings help them fly?

Summary Today’s talk was about…………………. I already knew that…………………… I just learned about……………….. I’d like to learn more about………………….