Plant Sensory Systems and Responses (Chapter 30)
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Questions and Answers

What percentage of Earth's surface is comprised of freshwater ecosystems?

  • 40%
  • 70%
  • 1.8% (correct)
  • 30%

    • What is the primary driver of natural selection in ecosystems?

  • Habitat alteration
  • Annual rainfall variation
  • Temperature variation
  • Limited resources (correct)

    • Which type of ecosystem is characterized by a high level of biodiversity despite its relatively small area?

  • Terrestrial ecosystems
  • Freshwater ecosystems
  • Biodiversity hotspots (correct)
  • Marine ecosystems

    • What is the term for the steady state of an ecosystem where all organisms are in balance?

    <p>Equilibrium</p> Signup and view all the answers

    What is the purpose of conceptual models in ecology?

    <p>To show the flow of energy</p> Signup and view all the answers

    What is the term for the community of living organisms and their interactions with the abiotic environment?

    <p>Ecosystem</p> Signup and view all the answers

    What is the primary function of aerial roots in epiphytes?

    <p>To absorb moisture from the atmosphere</p> Signup and view all the answers

    Which type of plant has no chlorophyll and obtains photosynthate by parasitizing fungi?

    <p>Saprophytic plant</p> Signup and view all the answers

    What is the term for the interaction between two or more species, including mycorrhizae and lichens?

    <p>Rare Symbionts</p> Signup and view all the answers

    What is the primary function of clingling aerial roots in epiphytes?

    <p>To absorb nutrients from humus that accumulates in tree crevices</p> Signup and view all the answers

    What is the term for the scientific study of interactions between organisms and their environment?

    <p>Ecology</p> Signup and view all the answers

    What is the primary function of the 3 hairs in the center of each leaf half of the Venus flytrap?

    <p>To detect prey and trigger closure of the leaf</p> Signup and view all the answers

    What is the primary function of the rhizosphere?

    <p>To facilitate nutrient uptake and solubilization</p> Signup and view all the answers

    Which of the following is a characteristic of mineral soil?

    <p>Formation from weathered rock fragments</p> Signup and view all the answers

    What is the primary advantage of hydroponics over traditional soil-based agriculture?

    <p>Enhanced nutrient uptake and availability</p> Signup and view all the answers

    What is the primary component of humus in soil?

    <p>Decomposed organic matter</p> Signup and view all the answers

    Which of the following is NOT a factor influencing soil formation?

    <p>Atmospheric oxygen levels</p> Signup and view all the answers

    What is the primary role of mycorrhizal fungi in plant nutrition?

    <p>To enhance nutrient uptake and availability</p> Signup and view all the answers

    What is the primary difference between ectomycorrhizal and endomycorrhizal fungi?

    <p>Location of fungal hyphae</p> Signup and view all the answers

    Which of the following nutrients is often limiting in soil for plant growth?

    <p>Phosphorus</p> Signup and view all the answers

    What is the primary role of nodules in legume roots?

    <p>To facilitate nitrogen fixation</p> Signup and view all the answers

    Which of the following is NOT a characteristic of clay soil particles?

    <p>Low nutrient availability</p> Signup and view all the answers

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