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Pyramids of numbers in an ecosystem can be upright or:

AInsulated
BInverted
CInvisible
DInjected
Answer & Solution
Correct answer: B. Inverted
1. One tree can support very many insects. 2. The base is then narrower than the level above. 3. So the pyramid can be inverted. _Source: OpenStax Biology 2e, Chapter 46, Ecosystems._
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