practicemurray2

practicemurray2 - Murray Practice Exam 2 This is a study...

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Murray Practice Exam 2 This is a study guide. Very few of these exact questions will be used on your exam. They simply serve as examples of the kinds of questions asked. A key will be handed- out at the end of a lecture. It is best to answer the questions on the sample exam before you check your answer with the key. Choose the Best Answer 1. Natural communities have: a. very low species diversity with a few species that are common and other species that are rare. b. very low species diversity with all species about equally common. c. high species diversity with a few species that are common and other species that are rare. d. high species diversity with all species about equally common. 2. Which of the following disturbances is frequently responsible for preventing trees from establishing in grasslands? a. volcanoes b. windstorms c. fire d. glaciations 3. Which of the following is not correlated with species diversity? a. latitude b. productivity c. longitude d. resilience Questions 4-6 refer to the hypothetical food web given in your laboratory manual. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. 4. Atmospheric carbon would enter the food web through which organisms? a. Bacteria b. Snails c. Water Fleas d. Coontail e. Damselfly Larvae
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the most biomass? a. Water Fleas b. Dragonfly Larvae c. Back Swimmers d. Damselfly Larvae 6. A few micrograms of Strontium 90 was added to this ecosystem. After several months, which species would be expected to show the lowest levels of this isotope? a. Water Fleas b. Dragonfly Larvae c. Back Swimmers d. Damselfly Larvae refer to an energy budget for a population of saddled prominent moth caterpillars in Hubbard Brook Forest. 7. During the study period, caterpillars assimilated 82 kilocalories per square meter per year from the 576 kilocalories of the tree leaves that they consumed. How many kilocalories were in the “frass” they egested? a. 658 b. 494 c. 104 d. 31 e. 7 8. Of the 82 kilocalories assimilated by these moth caterpillars, 31 kilocalories were stored as growth and reproduction. What proportion of assimilated energy is used for respiration? a. 0.98 b. 0.81 c. 0.75 d. 0.62 e. 0.38 9. One of the lessons from a pyramid of energy is that: a. only one-half of the energy in one trophic level is passed on to the next level. b. eating grain-fed beef is an inefficient means of obtaining the energy trapped by photosynthesis. c. most of the energy from one trophic level is incorporated into the biomass of the next trophic level. d. the energy lost in cellular respiration is 10% of the available energy in each trophic level. e. the efficiency of energy conversion is highest for primary consumers.
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practicemurray2 - Murray Practice Exam 2 This is a study...

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