Phoebus Levene was the first to describe the structure of nucleotides and how they were bonded together with phosphodiester linkages. In 1919, he incorrectly proposed the tetranucleotide hypothesis, which stated that nucleic acids were polymers consisting of GCTA repeated over and over. If his model had been correct, then how would it affect the information that could be stored in the DNA

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.

What type of plant is good for a bioassay and where can i buy it? i only have a month.

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.