LSU Bio 1201 Exam 1 Pomarico written exam questions and answers

LSU Bio 1201 Exam 1 Pomarico written exam questions and answers about ______ million species have been named and identifies - 1.8 million species -with so many different species there are many similarities evolution is a _____ theme in biology - central the ability to evolve is built into organisms - -organisms within a species are variable (e.g., some are tall some are short) -variability means some are better suited to survival. -variability comes from the genes and genes are inherited. conclusion: more "good genes are inherited" life contains an ______ of structural levels with each building on the levels beneath it - order Hierarchy of Biological Organization - -atoms -molecule -macromolecules -organelles -cells -tissues -organs -organ systems -organisms -populations -community -ecosystem -biomes -biosphere Each level of biological organization has - emergent properties emergent properties - is a property that emerges as a result of the arrangement and interactions of parts as complexity increases Life has the ability to - to acquire material and energy >The material and energy are often transformed< energy - the capacity to do work This study source was downloaded by from on :48:31 GMT -05:00 DR ERIC DR ERIC DR ERIC DR ERIC DR ERIC DR ERIC All levels of biological organization are thermodynamically - "open systems" Structure and function - are related Organisms _________ and cells are the ________________ - reproduce basic unit of life prokaryotic cells - are cells which lack internal cellular membranes (no nucleus or organelles) eukaryotic cells - are cells which have a membrane closed nucleus and membrane-enclosed organelles DNA is the basis of heritable information The passing of DNA from one generation to another is the basis of - inheritance. inheritance - Acquisition of traits by transmission of DNA from parent to offspring. This process of transmitting the DNA to new generations is built into the functions of reproduction. DNA also provides the instructional methods that guide the ________________________________ of multicellular organism. . - growth and development Organisms have the ability to maintain their structure and regulate their internal environment. ___________________ and _______________ are the 2 common mechanism used for regulation. - Negative feedback positive feedback Homeostasis - A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level There are two _____________ domains :Bacteria and Archaea, and a ________________domain : Eukarya - prokaryotic eukaryotic In domain Eukarya there are currently four subdivisions known as kingdoms : - Protista, plantae, fungi, and animalia Science is an activity that often involves one of 2 methods : - discovery science and hypothesis based science Quantitative data and qualitative data Both methods also follow certain principles - 1) all events have a natural cause - natural causality This study source was downloaded by from on :48:31 GMT -05:00 DR ERIC DR ERIC DR ERIC DR ERIC DR ERIC DR ERIC 2) natural causes obey natural laws 3) natural laws don't change with time or distance Hypothesis based science uses a ---------------- process and deductive reasoning - HYPOTHETICO￾DEDUCTIVE the scientific method - Make observations - Lights don't go on when you flip the light switch. Form a hypothesis - Bulb is burned out. Conduct experiments - Change the bulb. Make conclusions - do the results of the experiments support your hypothesis If not then you have to change your hypothesis If they do then your one step closer to a theory theory - is an explanation of natural events that is based on a LARGE number of observations and/or experiments. matter - Anything that has mass and takes up space mass - is the amount of material in an object (mass does not equal weight) element - a substance that cannot be broken down or converted to a different substance by chemical reactions Make up 96% of living matter - Oxygen (O), Carbon (C), Hydrogen (H), Nitrogen (N) trace elements - elements required by an organism in only minute quantities K = potassium ------ S = sulfur P = phosphorous Ca = calcium Na = sodium 3.7% Cl = chlorine Mg = magnesium Atom - The smallest unit of matter that retains the properties of an element Atoms are made up of - subatomic particles