The ecological pyramid is smaller at the top due to the lower amount of species to fit into the category (diversity is decreased, and the higher, the more suppressed the energy is in the animals/species).
From tiny blood cells/vessels!
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The correct answer is A buildup of lactic acid in the tissues I think. I hope this helped dear:)
You see, passive transport needs no energy. So that being said, it moves from areas with high concentration to areas with low concentration.
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Answer:
mitochondrion / mitochondria coming from the apex.