Which of the following properties is unique to echinoderms within higher invertebrates?

because of

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!