What percentage of algae uses photosynthesis to make their own food?

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

As an asteroid comes close to earth, it's name will change to? apex

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.