Which of these is a characteristic of index fossils? 1. Found in the topmost rock layer
2. Found in many layers of the same rock
3. Have already established relative age
4. Are limited to a particular geographic location

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

What was on result of the potato famine

Astate's representation in the u.s. senate is based on a) equal representation. b) the state's population. c) the state's electoral votes. d) the size of their major cities.this independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren cthis independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren commission (wc) b) federal election commission (fec) c) equal opportunity commission (eoc) d) securities and exchange commission (sec)