IB Biology - 1.1 Latest Update Graded A

IB Biology - 1.1 Latest Update Graded A cell theory theory that states that all organisms are composed of cells, and that all cells come from pre-existing cells centi metric prefix for 1/100th or 1 • 10^(-2) coarse focus dial used to initially focus a light microscope on a specimen differentiation the alteration of a cell's morphology and physiology through changes in gene expression emergent property a property of a system that emerges from the interaction of the elements of the system gene expression the synthesis of a functional gene product, often protein, but also rRNA , tRNA, and snRNA growth an increase in physical size homeostasis the process in which an organism regulates activities within cells and their bodies to keep conditions stable magnification ratio of image size to actual size metabolism the sum of all of he chemical reactions that occur within an organism or cell micro metric prefix for 1 • 10^(-6) milli metric prefix for 1 • 10^(-3) nano metric prefix for 1 • 10^(-9) objective lens the part of the microscope that gathers light from the specimen and focuses it to produce a real image paramecium genus of single-celled ciliated organisms reductionism an approach to science which claims that a complex system can be best understood as the sum of its parts and that variables can be studied in isolation response in behavioral science, the behavior that is the consequence of a stimulus scale bar a means of visually indicating