PLEASE HELP A Describe the role of the promoter in eukaryotic gene expression. Explain how a negative regulatory molecule could inhibit
transcription at the promoter
B. Identify TWO events that occur during RNA processing. Explain how RNA splicing increases the variation of mRNA
molecules
C. Describe the role of miRNA in gene expression

Convert 0.14 kilograms to grams. grams

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

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.