exam4key-311Dsp09 - Dr. Reichlers Bio 311D class time:_...

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Dr. Reichler’s Bio 311D class time:_________ Print Name:___________KEY________________ Exam #4 April 29, 2009 1. Would you expect the blood in your lungs to be more acidic in the summer or winter? Why? (8 pts) Winter, there are fewer living plants in the winter, and therefore less CO 2 is being pulled out of the atmosphere and into plants. So CO 2 levels are higher in winter which means that less CO2 can diffuse out of the lungs, and more CO 2 in the blood leads to more carbonic acid. 2. You want to minimize the loss of plant produced energy when you eat a cow (a primary consumer). On your ranch you have a juvenile, a young adult, and an older adult. Which cow would you eat to minimize the loss of plant produced energy? Why? (8 pts) The young adult cow. The older adult has stopped growing a long time ago, and so it has been consuming much energy for metabolic functions, but not putting much energy into growth. The juvenile cow is too small, and has not finished growing. The young adult cow has just finished growing, and it is at the most efficient time to get the most of the plant energy without the cow using much more energy for metabolic activities. 3. You have just eaten some whole wheat bread that contains only complex sugars. Would you find any simple sugars in your stomach? Why or why not? (8 pts) Yes, amylase in saliva has chemically digested some of the complex sugar to simple sugars. 4.
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exam4key-311Dsp09 - Dr. Reichlers Bio 311D class time:_...

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