The sun and soil play extremely important role in the food chain? true or false

True

Explanation:

Nothing can grow or be alive without the sun and if the vegetation doesn't grow what will herbivores eat and if there's no herbivores what will the carnivores eat. The same goes for soil.

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the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.