Unit 1 Assessment 9 of 14 9 of 14 Items

Large forest fires, started by lightning, have been common in parts of the Western and Northwestern United States in the past few years. The forest ecosystem is changed by this natural disaster. In addition to the loss of property, there are other ways that forest fires affect the environment.

Which of the following is a result of a large forest fire?

Wildlife populations will increase in the area .

Wildlife populations will decrease in the area.

New plant growth will decrease for many years.

All new organisms will populate the area.

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.