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College Ecology Questions

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College Communities, Populations, and Ecosystems
                  have limited homeostatic capability, and often have a high mortality rate.
  1. a-selected species
  2. b-selected species
  3. r-selected species
  4. k-selected species
College Food Chains and Webs
What name is given to organisms that make their food and supply food to almost all other organisms?
  1. chemotrophs
  2. heterotrophs
  3. manufacturers
  4. synthesizers
  5. primary producers
College Biomes
Savannas are unique because                                             .
  1. they have two coexistent types of vegetation
  2. they experience Hadley cell circulation
  3. are characterized by their seasonality
  4. none of these
  5. all of these
College Conservation and Biodiversity
Which of the following statements is true?
  1. humans may have been causing extinctions millions of years ago, but our impact has recently increased
  2. humans are responsible for many of the mass extinctions in the geologic record
  3. humans only began causing extinctions in the past 150 years
  4. humans have never had significant impact on species extinctions until the past four decades
  5. humans may have been causing extinctions thousands of years ago, but our impact has recently increased
College Communities, Populations, and Ecosystems
                 is the proportion of individuals in different age categories.
  1. Sex Ratio
  2. Age Distribution
  3. Sex Distribution
  4. Age Ratio
College Conservation and Biodiversity
Which is not one of the three factors that play a role in extinction?
  1. introduced species
  2. predator/prey variation
  3. habitat loss
  4. species overexploitation
College Food Chains and Webs
Which definition best characterizes biomass?
  1. the total weight of an organism
  2. the dry weight of an organism
  3. the weight of tissue in an animal
  4. the weight of organic matter in a plant
College Biomes
Which of the following is not true near the bottom of streams?
  1. velocity increases
  2. velocity slows
  3. turbulent less
College Communities, Populations, and Ecosystems
                        can often be seen in similar species that occupy the same geographical area, with an example being lizards living in different tree sections.
  1. Resource partitioning
  2. Competitive exclusion
  3. Resource exclusion
  4. Competitive partitioning
College Conservation and Biodiversity
Which of the folloiwng is a consequence of acidic deposition?
  1. It increases the likelihood of low-lying ground fogs
  2. It results in offshore eutrophication, damaging coral reefs
  3. It creates rainwater that can damgae skin cells or cause cancers
  4. Leaching out important minerals from soils and loss of biodiversity
  5. It is increasing the rate of global warming
College Communities, Populations, and Ecosystems
What is the measure of fitness?
  1. how long a species lives
  2. survival under adverse conditions
  3. number of fertile offspring produced
  4. strength in a predator
  5. fleetness in prey
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