1. Which of the following describes confirmatory analysis? 1. Clear hypotheses about the data are tested
2. concerned with avoiding answering the original research question
3. no clear hypothesis is stated before analyzing the data, and the data is searched for models that describe the data well
4. analyses aimed at answering the research question are performed as well as any other relevant analysis needed to write the first draft of the research report

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

What causes the phospholipids to organize themselves the way they do

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?