Temperature Variability in Ecology

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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?

Direct exposure of protoplasm to light is lethal. Signup and view all the answers

How does light quality impact organisms?

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

What is the ecological importance of light intensity and duration?

Both animals and plants respond differently to varying light intensities and durations. 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?

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

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

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

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

Light intensity Signup and view all the answers

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

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

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

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

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

$25-75$ degrees Celsius Signup and view all the answers

What does the ecological footprint represent?

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

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

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

What does environmental sustainability aim to achieve?

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

How is sustainability related to ecosystem functioning?

Sustainability ensures ecosystems can function indefinitely without strain Signup and view all the answers

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

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

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

Technological advances may offset the environmental impact of increased consumption Signup and view all the answers