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Ninth Grade (Grade 9) Ecology Questions

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Grade 9 :: Ecology by caryocs
Which is a biotic factor operating within an ecosystem?
  1. the type of climate in a given region
  2. the carnivores that consume other animals
  3. the amount of helium gas in the air
  4. the rate of flow of water in a river
Grade 9 :: Ecology by caryocs
Grade 9 :: Ecology by caryocs
Grade 9 :: Ecology by mpjose
Grade 9 :: Ecology by PMISIAS
Which of these factors increases the size of a population?
  1. birthrate
  2. emigration
  3. death rate
  4. carrying capacity
Grade 9 :: Ecology by sbeck
Grade 9 :: Ecology by mrsbateacher
In the nitrogen cycle, nitrogen is fixed by
  1. nitrogen-fixing bacteria
  2. lightning
  3. a only
  4. a and b
  5. none of the above
Grade 9 :: Ecology by PMISIAS
All of the following are density dependent factors EXCEPT
  1. Competition
  2. Predation
  3. Commensalism
  4. Parasitism and disease
Grade 9 :: Ecology by TeacherClara
Grade 9 :: Ecology by der1228
Grade 9 :: Ecology by sbeck
What is a biosphere?
  1. Any individual living thing
  2. All organisms and the parts of earth where they exist
  3. A chemical process
Grade 9 :: Ecology by der1228
Organisms in the lowest trophic level of an ecosystem are always
  1. herbivores
  2. carnivores
  3. heterotrophs
  4. autotrophs
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