Explain why energy in most ecosystems must flow from the sun, then to autotrophs and finally to heterotrophs, in that order.
Explain how waste heat is inevitable in ecosystems.
Ecosystem productivity is principally limited by _______.
What percentage of a lower trophic level’s energy flows to the next higher trophic level?
Explain why cold-blooded organisms like reptiles have a higher rate of secondary productivity than warm-blooded mammals.
When sunlight strikes Earth, approximately _______.
Which of the following is not a direct fate of the energy flowing through photosynthesis?
Which of the following is not true about energy in ecosystems?
Why is energy flow through an ecosystem dependent upon continual energy transformations?
Explain why lightning strikes can be dangerous even when an individual is not directly struck.
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