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The crown of the _________________ is wider mesiodistally than labiolingually.

The part of the tooth that shows when someone opens the mouth is the anatomic crown.

Which (extracted) incisors are the most difficult to identify as right or left?

The _____________________incisor is about half the width of the ________________________incisor.

From the incisal view, the ______________________ incisors exhibit the most convexity labially and lingually.

Which group of animals radiated/evolved rapidly after the dinosaurs became extinct?

This question is mandatory. Using your notes from the Making of North America video, choose two facts that you found interesting. Tell me about each fact in about 3 – 4 sentences each. 

Fossils from the post Permian extinction event record a happy, healthy open marine environment. Why then, did the majority of the organisms change from epifaunal suspension feeders to infaunal suspension feeders?

The K-T extinction event resulted in the extinctions of organisms at all points along the food chain. List a simple food chain from bottom to top using groups of organisms from the Mesozoic. Then make a statement about the significance of plankton extinctions. 

Which living fossil insect had wingspans of up to 70 cm?