1) Which of the following did dinosaurs NOT eat during the Mesozoic Era (251.9 to 66.0 million years ago) because it/they had not evolved?

a) Other dinosaurs

b) Mammals

c) Grass

d) Insects

 

2) Approximately how many teeth did a fully grown T. rex have during its lifetime?

a) 20-30 teeth

b) 50-60 teeth

c) 80-90 teeth

d) 100-110 teeth