The dynasty that ruled egypt after the death of alexander was ptolemy pharaoh cleisthenes

In a planned economy, which of the following does the job of market forces in order to determine the outcomes?

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a. seismic waves kill microoganisms b. seismic waves disrupts the sand and causes seafloor erosion c. seismic waves have virtually no adverse affects on marine life d. seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

What event caused germany’s economy to fail?