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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 Biomes
Put the levels of organization in order from smallest (1) to largest (6)
__ 1 A. Individual
__ 2 B. Biome
__ 3 C. Population
__ 4 D. Biosphere
__ 5 E. Community
__ 6 F. Ecosystem
Grade 12 Biomes
The ocean floor region is the                 .
  1. pelagic zone
  2. benthic zone
  3. mesopelagic zone
  4. epipelagic zone
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
Hermit crabs, periwinkle snails, and many macroalgae inhabit which area of the ocean biome?
  1. deep ocean
  2. intertidal zone
  3. open ocean
  4. black zone
Grade 12 Food Chains and Webs
Heterotrophs are known as                .
  1. antagonists
  2. inhibitors
  3. consumers
  4. nucleic acids
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 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 Biogeochemical Cycles
We know that temperature controls the rate of respiration and changes the amount of organic matter stored in soil. 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 Biomes
Which of the following is an abiotic factor of an ecosystem?
  1. Types of herbivores
  2. Fungi on a rock
  3. Water
  4. Fruit
  5. Decomposers
Grade 12 Biogeochemical Cycles
What is carbon assimilation?
  1. rate at which plants convert carbon dioxide to oxygen
  2. frequency with which plants perform photosynthesis
  3. amount of carbon dioxide that plants convert to glucose
  4. rate at which plants convert carbon dioxide to glucose
Grade 12 Biomes
Which of the following statements is NOT correct?
  1. Biomes move as the climate changes.
  2. The surface of the Earth is a series of connected ecosystems.
  3. Ecosystems can be as small as a tide pool or as large as a desert.
  4. An ecosystem can be made of multiple biomes.
  5. Biomes can be defined by soil, geology, and temperature.
Grade 12 Communities, Populations, and Ecosystems
Two male deer competing for mates is an example of interspecific competition.
  1. True
  2. False
Grade 12 Biomes
Match the biome with its description.
Biomes With Text Labels
__ Tundra A. Covers about 1/5 of the Earth's surface, very little rainfall, extreme daily temperature fluctuations.
__ Taiga B. Two distinct seasons, rolling grassland, warm temperatures year round.
__ Deciduous forest C. Long growing season, nutrient rich soil, four seasons.
__ Desert D. Temperate, semi-arid, grassy plains.
__ Steppe E. Short and wet summers, primarily coniferous trees, short growing season.
__ Savanna F. Low biodiversity, short growing season, few trees.
Grade 12 Biomes
Which of the following is a biotic factor of an ecosystem?
  1. Soil
  2. Protists
  3. Temperature
  4. Type of precipitation
  5. Water
Grade 12 Food Chains and Webs
Autotrophic organisms can tap                 sources of energy.
  1. other
  2. common
  3. outside
  4. solar
Grade 12 Communities, Populations, and Ecosystems
Pests can be prevented by other animals or insects within the general environment.
  1. True
  2. False
Grade 12 Biomes
What is an ecosystem?
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