Study Guide Exam 3

Study Guide Exam 3 - Study Guide Exam 3 SCI 1101 While not intended to cover every possible question the material below should help you in focusing

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Study Guide - Exam 3 SCI 1101 While not intended to cover every possible question, the material below should help you in focusing your study efforts for the upcoming exam. Do not overlook the textbook and any outside readings (if applicable). Ecosystems 1 (1.)Define and ecosystem, and describe how life is a function of ecosystems, not organisms. a. A community of organisms and its local nonliving environment in which matter cycles and energy flows. b. Organisms depend on each other for survival, and no organisms make their own food and decompose their own wastes. (2.)Provide examples of abiotic and biotic ecosystem components. a. Abiotic: i. Non living things like Water, rocks, soils, temperature, weather, sunlight b. Biotic: i. Plants, animals, bacteria, fungi, protists (3.)Discriminate between Autotrophs and Heterotrophs, define the different types of heterotrophs, and identify the trophic level of each. a. Autotrophs are producers, and they make food from inorganic chemicals and energy sources. This includes plants algae, and some variations of bacteria b. Heterotrophs consume other organisms. i. There are four types 1. Herbivores 2. Carnivores 3. Omnivores 4. Decomposers c. Trophic Levels i. 1 st : Producers
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2 nd : Primary Consumers (herbivores) iii. 3 rd : Secondary consumers (carnivores) iv. 4 th : Tertiary consumers (carnivores) v. None for decomposers (4.)Compare and contrast food chains and webs. a. Food Chains: follows a single path as animals eat each other b. (5.)Explain the flow of energy in ecosystems. Compare and contrast gross and net production and the importance in ecosystem energetics a. Solar Radiation > Plants (autotrophs) > [Chemical Energy] > Omnivores > Carnivores b. Gross production: the production of organic matter (sugar & biomass) by an organism c. i. Net production = gross production – respiration ii. 1. New biomass = 10% of energy 2. Respiration = 90% of energy 3. Procedures alone “create” chemical energy 4. Lose 90% of w/ each trophic level (6.) Describe the flow of energy through trophic levels, and explain how energy flow results in the pyramidal shape of organism biomass at each trophic level. Ecosystems 2 (1.) Explain the concept of a biological "niche", explain how it relates to the principle of competitive exclusion, describe how organisms prevent competitive exclusion in nature, and give one example of this phenomenon. a.
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This note was uploaded on 06/16/2011 for the course SCI 1101 taught by Professor Jbrock during the Spring '07 term at Kennesaw.

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Study Guide Exam 3 - Study Guide Exam 3 SCI 1101 While not intended to cover every possible question the material below should help you in focusing

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