4. What advantage do plankton gain by storing lipids within their bodies? a. It makes them less dense than water, thus aiding in buoyancy.

b. It forms air pockets that makes them more buoyant.

c. It allows them to store large amounts of energy.

d. It makes their cells heavier so they sink into the water.

e. It increases their density so they sink into the water.

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).