Astudent wants to find out if aspirin keep cut flowers fresh. she wants to set up an experiment to test this, but first, she must set up the hypothesis. which statement is the best hypothesis to test the question she is asking? if an aspirin is added, then it will keep the flowers fresh. if an aspirin is added to the water, then it will keep the flowers fresh. if an aspirin is added to the water in a vase of daffodils, then the flowers’ wilting time will not change because aspirin has no effect on the wilting time of daffodils. if an aspirin is added to the water in a vase of daffodils, then the flowers will remain fresh longer because aspirin lengthens freshness.

Which is the best way to define a common in environmental science a. a worthless resource b. shared resource c. a rare resource d. a typical resource

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 atmospheric later is where earths northern and southern lights occur