The Mesozoic Era is a time in Earth history when ________.
A)the first abundant shelly organisms appeared in the fossil record
B)Earth's interior was so hot that a solid outer crust,if present,was likely being extensively remelted
C)stable continental interiors,termed cratons,first formed
D)the dinosaurs appeared and came to dominate large-scale terrestrial life

Question

Quizplus · Accepted Answer

The Mesozoic Era is commonly known as the "Age of Dinosaurs" as this is when they first appeared and came to dominate the large-scale terrestrial life. Option A is incorrect as shelly organisms appeared much earlier in the Paleozoic Era. Option B is not specific to the Mesozoic Era and can apply to any time in Earth's history. Option C is also incorrect as cratons formed much earlier in the Archean Eon.

The Mesozoic Era Is a Time in Earth History When