During the scene with Amelia in the biology lab, Wei-Chen has an affinity to the teacher's lipstick-wearing monkey, who will not leave him alone. Wei-Chen can easily recognize that the monkey is actually a male, just as the monkey can actually recognize that Wei-Chen is a monkey himself.
Did the first vertebrates evolve during the mesozoic era? No. The 1st vertebrates appeared in the fossil record about 525 million years ago during the Cambrian Period.
Tetrapod-like vertebrates first appeared in the early Devonian period. These early stem-tetrapods would have been animals similar to Ichthyostega, with legs and lungs as well as gills, but still primarily aquatic and unsuited to life on land.etrapod-like vertebrates first appeared in the early Devonian period. These early stem-tetrapods would have been animals similar to Ichthyostega, with legs and lungs as well as gills, but still primarily aquatic and unsuited to life on land.