How do electrons gain energy in photosystem i? a. they take energy from the atp molecules b. they absorb photons. c. they use energy from a hydrogen ion pump d. they use energy in the form of glucose.

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.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

2points what do bacteria have in common with the cells of other living organisms?