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(1) the colorado river carved out a deep canyon in the habitat of an abert’s squirrel population. this is an example of which stage of speciation?

a) the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
b) the populations are isolated and thus do not interbreed.
c) the populations become totally separated from one another.
d) the populations successfully interbreed.

(2) the formation of the canyon acted as a barrier that prevented any mating between the separated populations. this is an example of which stage of speciation?

a) the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
b) the populations are isolated and thus do not interbreed.
c) the populations become totally separated from one another.
d) the populations successfully interbreed.

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

What is one way intensive agriculture can contribute to climate change? a. tree loss to agriculture increases earth's albedo b. livestock manure absorbs greenhouse gases c. large herds of livestock release greenhouse gases d. fewer trees are available to replenish petroleum stores appex

Differentiate renewable and nonrenewable resources