Assignment: Mount St. Helens Succession Exploration Study the photos you found in your “Mount St. Helens succession photos” search. Scan the photograph you used here. Be sure to submit your photographs, too (i. e. scanned or digital images). Questions 1. In one part of the activity, you looked at photographs and placed them in order. How did you determine the order that the photos should go in? 2. When looking at your pictures in order, describe the changes to the area. What changes happened first? Why do you think that is? 3. The gradual change in an ecosystem in response to environmental change is called succession. From what you have learned, how is Mount St. Helens an example of succession? Explain. 4. Look at time lapse photographs of the Scorch, standing dead forest from 4 and 7 years after the blast on the site http://www. mshslc. org/return-to-life/changing-landsca pe/. By what mechanism do you think these plants arrived in the new area? How did they benefit the ecosystem? 5. Colonizing plants help prepare the soil for the growth of other species of plants Look at time lapse photographs of the Scorch, standing dead forest from 17 and 30 years after the blast on the site http://www. mshslc. org/return-to-life/changing-landsca pe/. Are these different plants than you saw in the photographs from Question 2?

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.  

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it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.