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Twelfth Grade (Grade 12) Ecology Questions

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Grade 12 Food Chains and Webs
Heterotrophs are known as
  1. antagonists.
  2. inhibitors.
  3. consumers.
  4. nucleic acids.
Grade 12 Biotic and Abiotic
What is the definition of a biotic factor?
  1. nonliving chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems
  2. any living component that affects the population of another organism or the environment
Grade 12 Communities, Populations, and Ecosystems
Cell populations go through a type of exponential growth called
  1. quadrupling.
  2. tripling.
  3. doubling.
  4. telekinesis.
Grade 12 Food Chains and Webs
Heterotrophs are known as
  1. antagonists.
  2. inhibitors.
  3. consumers.
  4. nucleic acids.
Grade 12 Biomes
The ocean floor region is the
  1. pelagic zone.
  2. benthic zone.
  3. mesopelagic zone.
  4. epipelagic zone.
Grade 12 Biogeochemical Cycles
We know that temperature controls the rate of respiration and changes the amount of organic matter stored in soils. Based on your knowledge of respiration, would you expect to find more carbon stored in soil in a cool or warm climate? Why?
  1. Cool, because there is less sunlight available, which reduces the rate of photosynthesis.
  2. Cool, because microbes in the soil are less active as evidenced through lower rates of respiration.
  3. Warm, because microbes in the soil have higher rates of respiration, which releases more carbon into the soil.
  4. Warm, because sunlight is readily available, which means plants increase their rate of photosynthesis, leading to more carbon produced.
Grade 12 Biogeochemical Cycles
What best defines carbon assimilation?
  1. The rate at which plants convert carbon dioxide to oxygen.
  2. The frequency with which plants perform photosynthesis.
  3. The amount of carbon dioxide plants convert to glucose.
  4. The rate at which plants convert carbon dioxide to glucose.
Grade 12 Food Chains and Webs
Grade 12 Biotic and Abiotic
Grade 12 Symbiosis
Grade 12 Biomes
What is the place where freshwater and saltwater mix in the ocean biome?
  1. chaparral
  2. estuary
  3. coastal runoff
  4. benthic community
Grade 12 Biomes
Grade 12 Communities, Populations, and Ecosystems
Grade 12 Communities, Populations, and Ecosystems
Grade 12 Communities, Populations, and Ecosystems
Grade 12 Communities, Populations, and Ecosystems
Grade 12 Communities, Populations, and Ecosystems
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