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Ecology Test

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5 Written Questions

5 Matching Questions

  1. density-independent factors
  2. Size of a population is limited by...
  3. food chain
  4. density of a population
  5. trophic level
  1. a a level within the food chain
  2. b pathway along which energy is transferred from one trophic or feeding level to another
  3. c # of births, deaths, immigration and emigration
  4. d no relationship with population density
  5. e # of individuals per unit area/volume

5 Multiple Choice Questions

  1. < 10 in of rainfall/yr.
    not even grasses survive
    most extreme temp. fluctuations
    daytime surface temp ~ 70° C
    barely vegetation --> heat is lost --> night is
    plants are drought resistant; annual
    most animals active during time when heat is
    not so intense; daytime: animals hide in
  2. maximize population size near the carrying capacity
  3. Energy is lost as it gets passed on.
  4. when a community is blown out, but there IS soil
  5. largest biome --- 3/4 of Earth
    most stable b/c temp vary little
    provides most of Earth's food and oxygen
    subdivided into regions based on amount of sunlight received, distance from shore, water depth, open water/ocean bottom

5 True/False Questions

  1. annual plants of desertnear equator
    abundant rain fall
    stable temp.
    high humidity
    4% of Earth, but 20% Earth's net C fixation
    most plant/animal diversity
    tall trees with epiphytes


  2. process of primary eco. successionno soil --> pioneer organisms (i.e. lichens & mosses) inhabit area --> rocks weathered & dead matter of pioneer organisms = soil --> grasses, bushes, trees come --> climax community


  3. nitrifying bacteriaNO₃⁻ to N₂


  4. chlorofluorocarbonschemicals from frigo & aerosol layers


  5. possible outcomes of competitive exclusionextinction, resource partitioning, character displacement


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