Enhancer I can stimulate the transcription of gene A, but the insulator blocks its effect on gene B Enhancer ll can stimulate the transcription of gene B, but the insulator blocks its effect on gene A What would be the effect of moving the insulator to a position between enhancer Il and the promoter for gene B? Insulator-binding protein Promoter Transcription start site Transcription start site O O O O The newly positioned insulator prevents enhancer Il from stimulating the transcription of gene B. The newly positioned insulator allows enhancer Il to hyperactivate gene B transcription. The new positioning of the insulator prevents gene A expression. The newly positioned insulator allows enhancer I to activate gene B transcription.

Complete the statements to identify the first two steps of meiosis i. (1 ) the first and longest step of meiosis i is called i. (2)the second step of meiosis i is called i.

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.

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human