Which branch of government decides if the laws are constitutional

What has been a long term effect on the panama canal

Plz which of the following statements about spanish plantations is not accurate? a. spanish plantations grew sugarcane for export to spain b. the spanish had little concerned for the lives of the indians who worked on the plantations. c. spanish plantations grew wide variety of crops and center produce to many different european countries. d. to replace the native americans our dying off the spanish imported african slaves.

Plz the 10 places that charles darwin stopped at to report his findings, and include dates?