exam3 - Bio 201 Ecology and Population Biology Fall 2007...

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Bio 201 Ecology and Population Biology Fall 2007 Burch/Umbanhowar Exam 3 November 9, 2007 Name PID I have neither given or received aid on this exam Honor code signature Total Points: 100 Part A: Multiple Choice Please mark the correct answer to each question on your scantron sheet. (4 points each) 1. Which of the following combination of traits might you find in a plant from cool, moist habitats: (1) reflective leaves, open growth, C3 photosynthesis (2) open growth, extensive/deep root system, C4 photosynthesis (3) dark pigmented leaves, compact growth, CAM photosynthesis (4) compact growth, dark leaves, C3 photosynthesis (5) reflective leaves, compact growth, C3 photosynthesis 2. Which of the following is a density dependent factor on population growth of an insect. (1) Competition for food (2) Annual fluctuation in precipitation (3) Trampling by elephants (4) Global warming (5) Flooding caused by a hurricane 3. Which of the following are adaptations that fish living in freshwater have to maintain osmotic balance within their cells (1) They drink very little (2) The absorb Cl- ions (3) They have dilute urine (4) All of the above (5) None of the above 4. Red squirrels populations used to be present all over Great Britain. However, Grey squirrels have been introduced to all of Wales and England and they carry a disease that kills off red squirrels, leav- ing them only in Scotland. Using geographic region as a proxy for niches, what are the fundamental and realized niches of red squirrels. (1) Fundamental: Wales and England Realized: Scotland (2) Fundamental: Scotland Realized: All of Britain (3) Fundamental: All of Britain Realized: Scotland (4) Fundamental: Wales and England Realized: Wales and England (5) Fundamental: All of Britain Realized: Wales and England
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Bio 201 Ecology and Population Biology Fall 2007 Burch/Umbanhowar 5. Which of the following is not an example of how plants provide a challenge for the herbivores that eat them. (1) Low nitrogen concentration (2) Toxic chemicals lead to illness and death. (3) Lignin, an important part of woody tissues, is difficult to digest (4) Seeds of plants frequently have higher nitrogen concentrations than other tissues (5) Grasses contain silica in their tissues that makes chewing difficult 6. Below is a figure giving a hypothetical age distribution for a population of raccoons. Which of the statements below is best supported by the figure Age (years) Relative Abundance 7 5 6 2 1 3 4 (1) There was a high reproduction event 4 years before and constant survivorship for all ages the past 7 years. (2) Three years ago, there was a disease that killed a high number of all raccoons and there was a high reproduction rate 2 years before.
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