What is the primary evidence that forms the basis of seafloor spreading? a. the rocks on the mid-oceanic ridges change densities in a symmetrical manner. b. the magnetic properties of rocks along the mid-oceanic ridges change alignment in a symmetrical manner. c. the rocks along the mid-oceanic ridges show age patterns in a symmetrical manner. d. the rocks along the mid-oceanic ridges have mineral patterns in a symmetrical manner.

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales