| AP Biology | ||||||||||||||||||||||||||
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I have quite finished updating this site so please check back soon for more goodies in AP Biology. Lots of practice questions and study notes to help you with AP Biology. Thanx!!! *******This week there is a special on Ecology****** | ||||||||||||||||||||||||||
| This is an outline of Ecology!!! | ||||||||||||||||||||||||||
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productivity. Organisms occupy different trophic levels based on how they acquire energy. Food chains and food webs describe the feeding relationships within ecosystems. Energy flows through trophic levels. Biological magnification occurs as toxic substances are passe through trophic levels. The carbon cycle is an atmospheric cycle. The nitrogen cycle is an atmospheric cycle. The phosphorus cycle is a sedimentary cycle. Most water remains chemically unchanged during the water cycle. Acid rain is caused by overloading the nitrogen and sulfur cycles. Interference with the carbon cycle is causing the greenhouse effect. Biodiversity and Ecosystem Stability Many physical factors also influence climate. Terrestrial biomes support characteristic plant communities. Rainfall, Temperature, and Vegetation Freshwater lakes have distinct regions of life and temperature. Freshwater lakes are classified according to their nutrient content. Marine ecosystems cover much of earth. 1.Most plant species fit into only a few morphological types. Which type seems most restricted by temperature and rainfall? a.trees b.shrubs c.grasses d.perennial herbs e.annual weeds 2.In which biome is the smallest fraction of carbon and nutrients present in the soil? a.tropical rain forest b.savanna c.tundra d.grassland e.coniferous forest 3.How do mountain ranges create deserts? a.by lifting land up into colder, drier air b.by completely blocking the flow of air into desert areas, thus preventing clouds from getting there c.by forcing air to first rise and then fall, thus causing rain on one side of the mountains and desert on the other d.by causing the world wind patterns that make certain latitudes very dry e.by causing very steep slopes that are subject to erosion 4.What is the primary reason that plants from distant, but climatically similar, places often look the same? a.common ancestry b.adaptation to the same physical conditions c.adaptation to similar herbivores d.continental drift e.effects of past climate change 5.Which of these biomes has been increased in area by human activities? a.savanna b.temperate rain forest c.grassland d.coniferous forest e.desert 6.What biome has the richest soil and has largely been converted to agriculture? a.tundra b.coniferous forest c.grassland d.tropical rain forest e.deciduous forest 7.The earth is generally hotter at the equator because: a.The earth bulges out at the equator, making it closer to the sun. b.The natural curve of the earth places the equator nearer the sun. c.The sun shines over the equator more hours in the day. d.There are large oceans near the equator to absorb large amounts of heat. e.The sun's rays strike the earth at nearly a right angle at the equator. 8.At 30 degrees north and south of the equator, there are very dry regions on the earth. Why? a.Cool air falls, is warmed, and absorbs moisture. b.Warm air falls and absorbs moisture. c.Cool air rises and water condenses. d.Warm air rises and water is evaporated. e.Air flows laterally across the land from the temperate zone. 9.A circular pattern of rotating water is called a ________. a.gyre b.cirque c.arete d.biome e.rotor 10.Which of the following factors is (are) frequently limiting in terrestrial environments? a.water b.appropriate temperatures c.oxygen and nutrients d.nitrogen gas e.water and appropriate temperatures 11.All of the following are (is) a characteristic of a tropical rain forest except: a.very high species diversity b.stratified vegetation c.fertile soil d.high temperatures e.arboreal animals 12.A region with grasses as the dominant vegetation form, widely spaced trees and thorny shrubs, and a pronounced dry season is a.tropical deciduous forest b.savanna c.desert d.tundra e.chaparral 13.Overgrazing and overuse of dry areas can cause them to receive even less rainfall, a process known as a.sahelization b.salinization c.dehydration d.laterization e.desertification 14.Which of the following North American biomes has been almost completely destroyed and used for agriculture? a.desert b.temperate deciduous forest c.grassland d.tundra e.taiga 15.The open water zone of a lake can be divided into the ________ and ________ zones. a.limnetic, littoral b.limnetic, profundal c.profundal, stratification d.temperate, taiga e.littoral, benthos
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