The chrysanthemum is one of the most popular ornamental plants, whose petal colors are primarily determined by pigment proteins. To develop various petal colors, scientists exposed multiple chrysanthemums to gamma rays (radiation) over a period of time. This resulted in offspring that produced new petal colors compared to previous generations. This is an example of

The bacteria found in a soil is usually harmful and measure are taken to remove any traces of microorganisms 1. true 2. false

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

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.