Bio Exam 1 Key

Bio Exam 1 Key - Biology 195Z 9/18/08 EXAM I Name _ Lab...

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Biology 195Z – 9/18/08 EXAM I Name ____________________________ Lab section (Circle) : Tues Wed Time: 9:30 11:30 1:30 3:30 **Please put your name on the first three pages of the exam and completely fill in your PURDUE ID NUMBER on the scantron sheet.** ** EXAMS WITHOUT A PURDUE ID NUMBER WILL NOT BE GRADED ** This exam consists of three sections and is worth 100 points (plus 3 extra credit points in the essay section). There are three questions in part one, one question in part two and 25 multiple choice questions in part three. Part I: Answer all of the following questions in a few sentences. Put all of your answers on the exam sheet. Each question is worth 6 points. 1. All living organisms, regardless of their size or complexity, are hierarchically arranged. Using any organism you are familiar with as a model, describe two consecutive levels in its hierarchical organization and describe an emergent property of each level. All organisms, both prokaryotes and eukaryotes, have the same basic hierarchical organization. Obviously, for unicellular organisms, tissues through organ systems do not apply. 1. atoms – combination of protons and electrons will give it unique chemical mass and bonding properties 2. molecules – produce diversity of components used as building blocks for living organisms that don’t exist in individual atoms alone 3. cells- smallest independent unit of living matter with specialized organelles or regions that can carry out separate functions within each cell. Have coordinated activity and show characteristics of life not found in biomolecules alone. 4. tissues- combination of cells of the same type that carry out a coordinated function – e.g. protective barrier to foreign invasion by the skin, connect parts of the body 5. organs – combination of different tissues into one structure that carries out a unique function – e.g. pumping of blood by the muscle, nervous and connective tissue that makes up the heart 6. organ systems – coordinate particular function within a body – e.g. circulatory system distributes material throughout the body and picks up waste for removal to facilitate the regulation of gases, nutrients, etc. 7. whole organism – integrate function from a variety of organ systems to create an organism that is capable of surviving and reproducing. 8. population- group of same species of individuals in an area that can have profound social and ecological effects and are what evolutionary forces act on. 9. community – groups of different species in a particular area that can enhance or hinder the existence of different individuals or populations within the community.
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Biology 195Z – 9/18/08 EXAM I 10. ecosystem.- characteristic groups of communities living in region, influenced by climate and ecological interactions. 2.
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Bio Exam 1 Key - Biology 195Z 9/18/08 EXAM I Name _ Lab...

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