Which students are practicing appropriate behavior in the laboratory? check all that apply. dylan eats a granola bar while setting up his laboratory equipment. montel washes his hands before entering the classroom. scarlett accidently drops a test tube and immediately alerts her teacher. cameron uses two thermometers as drumsticks on his notebook. maelynn places her backpack underneath the laboratory table. madison repeatedly rubs her eyes during the laboratory procedure.

What type of genetic drift would be simulated if all the beans that were not selected died out?

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

What is the one part of the nucleotide  that differs among the other different nucle  tides?