Erwin Chargaff examined DNA samples from different organisms to study base pairing. Some data from DNA
samples are shown.

Which conclusion is supported by the data in the table?

A. Each organism contains more cytosine than any other base.

B. The three organisms have the same sequence of nucleotides.

C. All three organisms contain the same types of nitrogen bases.

D. The presence of each base is dependent on the size of the organism.

Which technically is nasa developing that will astronauts reach mars

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.

Which could be a pathway of food through an ecosystem