Temperature Variability in Ecology
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Questions and Answers

Why can some organisms, especially in a resting stage, exist at very low temperatures?

  • They have special adaptations that allow them to survive at low temperatures. (correct)
  • They prefer the extreme cold temperatures for their life processes.
  • Their metabolic rate increases at low temperatures.
  • They go into a state of hibernation to conserve energy.

    • How do constant temperatures affect organisms that are normally subjected to variable temperatures in nature?

  • They are depressed, inhibited, or slowed down. (correct)
  • They adapt quickly to constant temperatures.
  • They become resistant to temperature changes.
  • They are accelerated in growth and reproduction.

    • What is the ultimate source of energy for life on Earth?

  • Temperature fluctuations
  • Oxygen
  • Light (correct)
  • Water

    • Why is light considered a limiting factor for organisms?

    <p>Direct exposure of protoplasm to light is lethal.</p> Signup and view all the answers

    How does light quality impact organisms?

    <p>Different wavelengths of light have varying effects on photosynthesis.</p> Signup and view all the answers

    What is the ecological importance of light intensity and duration?

    <p>Both animals and plants respond differently to varying light intensities and durations.</p> Signup and view all the answers

    What is the main reason why sunlight quality does not have a significant impact on the rate of photosynthesis in terrestrial ecosystems?

    <p>The red and blues are filtered out by attenuation, leaving poorly absorbed greenish light.</p> Signup and view all the answers

    How does water play a role as a limiting factor in both land and saline water environments?

    <p>Fluctuations in water amount can affect organisms through osmosis.</p> Signup and view all the answers

    Which of the following factors is NOT a principal factor measured when considering the impact on organisms?

    <p>Light intensity</p> Signup and view all the answers

    How does the distribution of rainfall over the year affect organisms?

    <p>It is a limiting factor for the survival of organisms.</p> Signup and view all the answers

    What is the significance of humidity for organisms in the air?

    <p>Low humidity encourages water loss from organisms by osmosis.</p> Signup and view all the answers

    What temperature range is suitable for life on Earth based on the text provided?

    <p>$25-75$ degrees Celsius</p> Signup and view all the answers

    What does the ecological footprint represent?

    <p>Amount of land required to supply each person with food</p> Signup and view all the answers

    Which factors are considered in the IPAT equation to estimate human impacts on the environment?

    <p>Number of people, affluence per person, environmental effects of technologies</p> Signup and view all the answers

    What does environmental sustainability aim to achieve?

    <p>Ensuring that current needs are met without risking future generations' needs</p> Signup and view all the answers

    How is sustainability related to ecosystem functioning?

    <p>Sustainability ensures ecosystems can function indefinitely without strain</p> Signup and view all the answers

    What is the significance of the IPAT equation in assessing environmental impact?

    <p>It evaluates the combined effect of population, affluence, and technology on the environment</p> Signup and view all the answers

    How does consumption of a particular resource relate to environmental impact?

    <p>Technological advances may offset the environmental impact of increased consumption</p> Signup and view all the answers

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