AGEC 1003 Lecture : Biology Notes Chpt 1
Document Summary
Atom molecule cell tissue organ system multicellular organism species population community ecosystem biosphere. Element= pure chemical substance consisting of only one type of atom. Hydrogen atoms+ 1 oxygen atom = water h2o. Contains a framework of carbon with some hydrogen. Composed of similar cells that perform a similar function. Organ- structure made up of several tissues that function as a unit like heart, lung, brain. Organ system: 2 or more organs working together to execute a specific bodily function ex- heart makes up part of circulatory system. Population- members of one species inhabiting same area antelope heard. Community -2 or more populations of different species of living organisms interacting within same area. Ecosystem- a community and its non- living environment. Biosphere- multiple ecosystems combined all levels of living and non- living. Depends on which question they want to answer. Cells- line digestive tracks and taking in nutrients. Digestive organ or system- combo of organs working together to acquire nutrients.
