Ecology (10c -11b - 12a - 12b - 12b - 12d - 12e)

6 Questions | Total Attempts: 302

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Ecology Quizzes & Trivia

2013-2014


Questions and Answers
  • 1. 
    Which role of protists has the most postive effect on maintaining that plant population in an ecosystem?
    • A. 

      Protists are a major food source for animals

    • B. 

      Protists produce approximately 75% of the oxygen on the Earth.

    • C. 

      Protists decompose dead materials, returning nutrients to the soil.

    • D. 

      Protists found in the gut of animals assist in digestion.

  • 2. 
    During secondary succession, which of these best describes why decomposing pioneer plants give way to larger, more complex plants species, such as hardwood trees?
    • A. 

      Increased amounts of sunlight are able to reach the ground while the pioneer species are decomposing.

    • B. 

      Increased soil temperatures from decomposing pioneer species help tree seeds germinate more quickly

    • C. 

      Increased amounts of decomposing pioneer species remove nutrients that tree seedlings need to grow and mature

    • D. 

      Increased amounts of soil from decomposing pioneer species allow plants with more extensive root systems to become established.

  • 3. 
    Grassland ecosystems in Texas have evloved to depend on periodic fires to return nutreitns to the soil and encourage plant reproduction.  Humans have prevented fires in many of these grassland areas, resulting in plant and animal communites with little diversity.  Wildlife biologists often recommend purposefully starting fires called prescribed burns, which are monitored and controlled, in grassland ecosystems every 3 to 4 years.  These biologists observe greater diversity in plant and animal life in the years following a prescribed burn. What natural processes are the biologists attempting to imitate?
    • A. 

      Biomagnification

    • B. 

      Succession

    • C. 

      Population bottleneck

    • D. 

      Species extinction

  • 4. 
    Saprophytes are fungi that feed on dead and decomposing organism.  They secrete enzymes that digest components of cell walls, such as cellulose and lignin. Which statement explains why these fungi are an important part of the biogeochemical cycle?
    • A. 

      Saprophytes perform gas exchange that assists the cellular activities of autotrophes.

    • B. 

      Saprophytes extract minerals from living tissue to recycle them back into the soil.

    • C. 

      Saprophytes transport nutrients through the xylem and phloem in autotrophs.

    • D. 

      Saprophytes return organic matieral to the soil for use by living organisms.

  • 5. 
    A small town in the piney woods of East Texas has a soccer field composed of native grasses.  The soccer field is mowed once a week.   What effect does continual mowing have on the ecology of the field?
    • A. 

      Mowing increases the likelihood of nonnative species displacing native species.

    • B. 

      Mowing increases the number of species found in the field

    • C. 

      Mowing causes different types of communities to form across the field.

    • D. 

      Mowing maintains a low species diversity by inhibiting further succession.

  • 6. 
    Enchanted Rock State Natural Area is located in Central Texas.  Enchanted Rock is a dome of granite.  The area contains four easily identifiable communities.  The table describes characteristics of each type of community in the area. Open Oak Woodland several species of oaks, cacti, and some scattered grasses among scattered boulders Mesquite Grassland mesquite trees, abundant grasses in areas with thick soil, and few boulders Floodplain a thick mix of trees, shrubs, grasses, and numerous wildflowers; floods with heavy rain. Granite Rock barren rock with lichen patches A student studying primary succession should focus on which of these communities?
    • A. 

      Open Oak Woodland

    • B. 

      Mesquite Grassland

    • C. 

      Floodplain

    • D. 

      Granite Rock