[BIO 121] - Midterm Exam Guide - Everything you need to know! (29 pages long)
Document Summary
Bio 121 week 1 lecture 1. Biology is the scientific study of life. Energy to power/convert chemicals to fuel life. Maintains internal environment despite potentially changing external environment. Dna genetic material inherited from parents. Biologists study life at levels ranging from the global to the submicroscopic. Each level in the biological hierarchy is more than the sum of its parts: new properties emerge at each level due to the arrangement and interaction of parts within the lower levels. The properties of life emerge at the level of the cell: the cell is the lowest level in the biological hierarchy that can be considered alive. Unicellular organisms consist of just one cell: multicellular organisms can consist of trillions of cells. Biosphere all of earth that contains life. Ecosystem all organisms in a particular area plus nonliving components (rock, water, air, animals, trees, etc. Community all organisms in a particular area and how they interact with each other.
