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.
First arthropods evolve: 530 million years ago: The first fish: 475 million years ago: First land plants: 385 million years ago: First forests: 370 million years ago: The first amphibians: 320 million years ago: The earliest reptiles: 225 million years ago: The dinosaurs evolve: 200 million years ago: The mammals evolve: 150 million years ago: First birds: 130 million years ago