An investigator transferred 100 μl of a 0.2% bpb solution to 900 μl of water and measures an absorbance of 0.3 at 590 nm. she wants to prepare another 1 ml sample with the same absorbance using a 0.5% bpb solution. how should she prepare thiskample? 1. add 75 μしof the bpb solution to 925 μl water. 2. add 250 μしof the bpb solution to 750 μl water. 3. add 25 μしof the bpb solution to 975 μl water. 4. add 40 μしof the bpb solution to 960 μl water.

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?