Their study might include d<span>etermining the pros and cons of using the light bulbs. After they've determined the good sides of using energy-efficient light bulbs, and the bad sides, they will certainly know the effects that these bulbs produce. Therefore they will decide whether it is a good idea to use them or to move on to something else. </span>
Eukaryotic cells<span> contain membrane-bound organelles, including a nucleus</span>.Prokaryotic cells<span> do not contain a nucleus or any other membrane-bound organelle.</span>
