Geographers use all of the following measures to determine population trends EXCEPT

the sex ratio.
the natural birthrate.
the crude death rate.
the dependency ratio.
the natural increase rate.

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

¿qué parte de la patagonia está en peligro de exinción por su sobrepesca?

Ageologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. as he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. he now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. as he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. he concludes