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University of Maryland BIOL 102/103 Week 7 Quiz - Biology Study Guide.

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University of Maryland BIOL 102/103 Week 7 Quiz - Biology Study Guide. Week 7 Quiz – Biology Study Guide 1. Which of the three lists of levels of life below is specific to ecological investig... ation? 2. The American Bald Eagle was on the Endangered Species list for many years, the bird's numbers have rebounded considerably. Study of these birds occurs at what level? 3. Designating a species, a K-selected species means that the species likely exhibits which set of characteristics? (Picture for Question 4) 4. Aphids and ants often have a close relationship as shown in this photo. The greenish insects are aphids. They are sluggish, soft-bodied insects that use piercing mouthparts to obtain sap (phloem) from plant hosts. To get the proteins they need, aphids must process a lot of sugary sap. They excrete a sweet fluid called honeydew as waste. Agile, quick ants swarm over the aphid colony, drinking the honeydew. Ants often protect their aphid “herds” from predators and may provide other services; for example they may move the flightless aphids from plant to plant. Plants often suffer reduced survival and growth when infested with aphids, particularly when aphids carry viral or bacterial diseases to their hosts. By rowe becky (flickr) (Myrmica ruginodis and aphids CC BY 2.0) What is the relationship between aphid and ant? 5. A field ecologist is studying a sage plant (Salvia leucophylla) that grows wild in Southern California. She notices the characteristic uniform dispersion of the plants in all the quadrats she has mapped out. What is a likely explanation for this dispersion pattern? 6. What can one infer from a relatively linear survivorship curve, and what organism generally exhibits this kind of survivorship curve? 1Week 7 Quiz – Biology Study Guide 7. What are the two primary parameters used to describe a population within a given habitat at a given point in time? 8. Choose the best definition of biosphere. 9. All of the organisms living together in a particular habitat and their interactions with their nonliving environment are called ____. 10. Logistic population growth patterns are indicative of what? 11. Of the three broad categories of ecosystems on earth, which cover most of earth's surface? 12. After a disturbance such as a wildfire, an ecosystem will undergo changes as it recovers. What is this process called? 13. Why are most food chains limited to three to five trophic levels? 14. This is an ecosystem energy pyramid that illustrates how much energy is found at each trophic level of a food chain. Select all the statements about this pyramid that are TRUE. Week 7 Quiz – Biology Study Guide 15. The large majority of climate scientists say that the current rate of global warming is caused by elevated levels of gases in the atmosphere. Which of the following gases is primarily responsible for this problem? 16. Which of the following is NOT a result of global warming? 17. A common theme in biology is that energy flows through biological systems while matter __________. 3 [Show More]

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