Which trace fossils are created when a creature leaves an impression in the sand, and then the impression is filled with hardened sediment?
a. coprolites
b. tracks and trails
c. molds and casts
d. burrows and borings

How did geographic isolation affect the islands in the australasia ecozobne?

Rah is completing a school project on the expansion of fast food restaurants across the united states. she finds a map that shows a clear pattern of restaurants beginning in the east and expanding west. this map was most likely created using the technology of

This desert is found in the northern part of africa and covers 3.5 million square miles.