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An element is also a pure substance. The reason for this is because an element contains only one type of particle.
Option A is correct
Answer: O D. To provide molecules for the electron transport chain
Explanation:
The answer is (1) !!
it is one direction, from sun to produces to consumer !!
<span> Very inefficient. Almost 90% of all energy is lost between trophic levels. That is why larger animals need to eat more, because less energy is being consumed.
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