What is the source of almost all of the energy in ecosystems?

Answer 1

Fundamentally, it is always the SUN!

In most ecosystems, all other biological processes would come to an end without the energy provided by sunlight.

Plants would be the first biological step in the food pyramid. The exact type will vary depending on the climate and region of the world, so it is impossible to narrow it down to just one kind of plant.

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Answer 2

Hudson Ansley

The sun is the primary source of almost all energy in ecosystems, captured through photosynthesis by plants and algae.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.