Which gene(s) seemed to play the biggest roll in the differentiation of a pancreas cell into a beta-islet cell?  4 & 9
5 & 6
6
6 & 7
9​

i think it is d. objects resist changes in their state of motion.

a bird that nests only in a particular tree species.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).