Initially, glucose was found only the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found the dialysis tub

Initially, glucose was found only  inside  the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found  outside  the dialysis tubing.

Explanation:

Edge

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).