Imagine that you are an ecologist who must determine whether an entire biome is being threatened by human activity. What might you look for in an
indicator species?
A. The species carved on rocks and other ancient bearers of art
B. The most well known species, which is likely to beglepicted on
C. A species of economic importance
D. Will likely be affected first if any part of the ecosystems are
degraded

With the california gold rush and the opening of the west came an increased interest in building a transcontinental railroad the first chinese were hired in 1865 at approximately $28 per month to do the very dangerous work of blasting and laying ties over the treacherous terrain of the high sierras in the beginning was slow and conquer the many embankments, the chinese workers used techniques they had learned in china to complete similar tasks. they were lowered by ropes from the top of cliffs in baskets, and while suspended, they chipped away at the granite and planted explosives that were used to blast tunnels1.* 11b this passage reflects workingefforts and conditions of which corporation? a. the transcontinentalrailway line b. the union pacific company c. the central pacific company d. the norfolkwestern company