A) tiny particles of glass called microtektites
B) "shocked quartz" grains, with fine parallel planes caused by a burst of intense pressure
C) the disappearance of many taxa of large reptiles beginning about 70 million years ago
D) a worldwide layer of sediments highly enriched in the element iridium
E) gravity anomalies that allow us to map the now-buried meteorite crater

A) epifaunal, suspension-feeding lifestyle
B) wider geographic ranges
C) planktonic larval stages
D) All of the above.
E) None of the above.

A) three clawed fingers on each hand
B) a long, bony tail
C) teeth
D) down-like feathers
E) All of the above.