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Answered

Chemical bonds

Aare always ionic.
Bcombine compounds to form elements.
Care always covalent.
Dhold atoms together to form compounds.

. A pyramid of numbers differs from an ecological pyramid because it

Ashows the amount of energy within each trophic level.
Bdisplays the number of organisms at each trophic level.
Cis organized by trophic levels, while an ecological pyramid isn't.
Dattempts to describe a food chain or food web.

Verified Answer :

Chemical bonds hold atoms together to form compounds through the sharing of electrons or the transferring of electrons. 
Bio is not my strongest subject, but I am pretty sure that a pyramid of numbers differs from an ecological pyramid because it displays the number of organisms at each trophic level

EllaGrig

D. displays the number of organisms at each trophic level.

Hope I was helpful :)

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