Why did the dinosaurs become extinct?
A)A meteorite or comet crashed into the Earth,causing smoke and ash that blocked the sun and caused death of the plants that were food for herbivorous dinosaurs.
B)Cycads and other gymnosperms upon which herbivorous dinosaurs fed declined,and the dinosaurs were unable to digest the angiosperms that arose in their place.
C)Increasing carbon dioxide levels produced climates too hot for the incubation of their eggs.
D)The changing climate caused the evolution of most dinosaur species into the existing bird,mammal,and reptile species that exist today.
E)The pollen produced by the rise in flowering plants produced allergenic responses in dinosaurs and interfered with their ability to communicate with potential mates.

Question

Quizplus · Accepted Answer

The most widely accepted theory for the extinction of the dinosaurs is that a large asteroid or comet hit the Earth, causing dust and debris to block out the sun and ultimately leading to a mass extinction event. This resulted in the death of the plants that were food for herbivorous dinosaurs, leading to a collapse of the food chain and the extinction of many dinosaur species.

Why Did the Dinosaurs Become Extinct