Compare and contrast a perceptual region and a formal region. A. A perceptual region does not have any formal, agreed upon boundaries. A formal region does
have defining boundaries.
B. A formal region does not have any formal, agreed upon boundaries. A perceptual region does
have defining boundaries.
C. A perceptual region is current and changing. A formal region is based on historical
boundaries.
cl Noginsky
D. A perceptual region is based on culture. A formal region is based on political boundaries.

According to the population pyramid, in 2000 china had about 120 million people in which age-group?

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

What is the carrying capacity of an ecosystem for a given population? a. the total number of species in the ecosystem b. the total number of predators in the ecosystem c. the minimum population size in that ecosystem d. the maximum population size in that ecosystem