Which commonly occurring fossil is a bivalve?
a. coral
b. crinoid
c. pectinoid
d. bryozoan

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons

In a command economy, the majority of goods and services are provided by the

Find the area of the shaded region.