The first described iguanodon bones were collected by

The First Iguanodon tooth was discovered in the 1822, it was considered to be one of the earliest dinosaur discoveries in the planet. In the year 1825, it was confirmed by Doctor Gideon mantel that the tooth he had discovered was of an Iguanodon, since the teeth he discovered was similar to the Iguana which is found today in our planet.

answer: dna

because all cells have genes