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.
THE DEVONIAN PERIOD (about 410 to 360 million years ago) THE FIRST LAND ANIMALS EVOLVE. The ancestry of all land animals, including the dinosaurs, can be traced back over 400 million years to the Devonian Period. During this period some animals moved to land from the water. The reason for this is that the land had food resources that had not been exploited.