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How many years ago did the first dinosaur appear?
A.230 million years
B.240 million years
C.250 million years
230 million years
How long did dinosaur dominate earth land ecostems?
A.for about 50 million years
B.for about 160 million years
C.for about 10 million years
for about 160 million years
What is the smallest dinosaur in roughly 150 million years ago?
A. T-rex
B. Compsonathus
C. Triceratops
Compsonathus
What's the weight of the stegosaurus's brain?(the smallest brain of the dinosaur)
A. 80grams
B. 150grams
C. 300grams
80grams
How dinosaur got sick?
A. Like humans
B. A,C correct
C. Like dog
Like humans