study guide LS Lander - 1. Compare two organisms that...

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1. Compare two organisms that differ in size but not shape. If the larger organism is twice as long, how much more surface area does it have? How much more volume? What if the larger organism is 3 times long as the smaller? SA changes by exponent of 2, volume by exponent of 3. So 2 times large is 22 and for volume, 3 times larger is 33. 2. What are three biological traits that you would expect to scale with surface area under isometry? Respiration, absorption of food, heat 3. What are three biological processes you would expect to scale with volume under isometry? Metabolism, weight, waste production 4. Metabolism in mammals has a scaling factor of 2.25. Which consumes more energy per gram, a mouse or an elephant? Which consumes more energy as a single organism, a mouse or an elephant (hint: if you had pet elephant and a pet mouse, which would you buy more food for?)? mice consumes more per gram - 5. What is the difference between endothermy and ectothermy? Between homeothermy and heterothermy? temperature regulation o Endotherm: (humans)(mostly terrestrial) * generate own heat * Waste heat from our metabolism o Ectotherm: * DonÕt generate own heat * Rely on something external o Homeotherm: * Maintain constant temperature * Through own physiology or through environment o Heterotherm * Variable temp 6. Young salmon switch from respiring across their skin to respiring across their gills as they increase in size. Why do gills provide a greater amount of surface area for respiration than their skin? Gills can maximize SA/V 7. Describe 5 ways that organisms can maximize SA/V. flattening, filamentous, cylinder, convoluted surface, pumps and circulation 8. Organisms have a fundamental need for energy and growth. What molecule is used for energy in living organisms? What type of molecule is the basic building block for growth? ATP, Carbon
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9. What type of chemical process besides one using an electric transport chain can be used to generate ATP? Fermentation 10. What is an electron donor? At what point is it used in an electron transport chain? What is an electron acceptor? At what point is it used in an electron transport chain?
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This note was uploaded on 10/28/2009 for the course ENGINEER 1509900200 taught by Professor Engineer during the Spring '09 term at Abraham Baldwin Agricultural College.

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study guide LS Lander - 1. Compare two organisms that...

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