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What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

What is true of sea slugs in these orders

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the