Chapter 1 Study Guide

4 Pages
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Department
Biological Sciences
Course Code
BIOA01H3
Professor
Mark Fitzpatrick

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Description
Chapter 1 Studying Life Living organisms consist of cells -unicellular-> a single cell that carries out all the functions of life -multi-cellular-> a number of cells that are specialized for different functions -spontaneous generation-> life arises from non-life -Pasteur-> life must be present in order for life to be generated ->germ theory of disease Cell Theory -all cells come from pre-existing cells -all cells are similar in chemical composition -most of the chemical reactions of life occur within cells -complete sets of genetic information are replicated and passed no during cell division The diversity of life is due to evolution by Natural Selection -living organism are described from common ancestor, relate to one another -species-> group of organism that are morphologically similar -> can breed successfully with one another -natural selection-> trait that increases probability of survival and reproduction is favoured and spread in the population - Adaptation- traits that enhance an organisms chances of survival & reproduction Biological information is contained in a genetic language common to all organisms -genome-> the sum total of all DNA molecules in the cell -gene-> specific segment of DNA -> contain information the cells use to make proteins -mutation-> caused by radiation ->most are deleterious ->beneficial mutation lead to evolution Cells use nutrients to supply energy and to build new structures -capture energy in chemical bond of nutrient -take in nutrient & break them down -2 functions of cells -1) synthesis-> build complex molecules from smaller chemical unit, carbohydrate are turned to fat -2) mechanical work-> move molecules from one location to another Living organism control their internal environment -multi-cellular cells have internal environment that is not cellular ->individual cells are bathed in the extracellular fluids for the purpose of receiving nutrient & excreting wastes www.notesolution.com
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