Hich is an example of a relative dating method?
a.
determining the order of rock layers in a canyon
b.
using radioisotopes to determine the age of a rock layer
c.
determining the types of rocks in rock layers of a canyon
d.
identifying the fossils in a layer of rock

Aresearcher is studying women recently admitted to a state prison. all potential subjects must have children under the age of five. research subjects will be given a basket of toys to use at their children’s first visit that the children can then take home. in assessing this proposal, the irb needs to determine that the toys are: age appropriate.not an excessive incentive.educational.of high quality.