What provides the energy for photosynthesis?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).