DNA and RNA are composed of nucleotides that are linked to one another in a chain by chemical bonds, called ester bonds, between the sugar base of one nucleotide and the phosphate group of the adjacent nucleotide.
The Black Panther was ranked the 79th greatest comic-book character by Wizard magazine. IGN ranked the character the 51st greatest comic-book hero. Chadwick Boseman will play the Black Panther in several scheduled films as a part of the Marvel Cinematic Universe.
Why is it important that Black Panther and Spider-Man showed up? Civil War marks the first silver screen appearance for Black Panther (played by Chadwick Boseman). He'll get his own movie in 2018, the first Marvel Studios movie with a black superhero as its central character.