What causes acid rain? A Chlorofluorocarbons react with water in the atmosphere to form acids. B Pesticides and fertilizers react with water in the atmosphere to form acids. C Steam from nuclear power plants reacts with water in the atmosphere to form acids. D Gases from burning fossil fuels react with water in the atmosphere to form acids.

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 label correctly identifies what x represents in the concept map?

Which topic is most likely to be studied by bo which topic is most likely to be studied by botanist? insect metamorphosis, viral infection, plant growth, animal physiology