What BEST describes the roles of photosystem I and photosystem II in the process of photosynthesis? O
A. They form ATP as hydrogen ions cross the thylakold membrane.
B. They absorb sunlight and distribute the energy as heat.
C. They transfer electrons from a series of intermediates to form NADPH.
D. They absorb sunlight and transfer the energy to electrons.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i 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).