Hundreds of millions of years ago--before organisms were buried to become fossil fuels--plants, algae, and plankton originally got their energy from where?

Calories from organisms they ate
Chemicals from inside the earth
Radiation from the sun
Absorption from the soil

the aswer is letter c

asfe afr dsef rfdg fghgnts fhbfgd   hdfdx

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.

what are the options