This is my last question on a biology assignment, I REALLY NEED HELP!

Thanks!

answer; ///(b) it is composed of four protein chains and four heme groups;

i think the answer is 95 hope this

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).