On which two dates could all the locations on earth have equal hours of day and night?

Compare and contrast the philosophies of constitutionalism and the divine right of kings. which has the greatest impact in the formation of the us constitution?

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

Which organelle is marked with an x?