if shell fragments are found in a rock sample, it is most likely
that the rock formed

a) on a mountian slope
c) from magma
b) on a glacier
d) in shallow water

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species