The table below shows the fossils of organisms found in various layers of an undisturbed rock: Fossils In Rock Layers Layer (from top) Fossils in Layer 1 X, W 2 W 3 Z 4 Y, U Which statement about the organisms whose fossils are found in the rock is correct? Organism W existed much before Organism Y. Organism Y existed over the longest period of time. Organism Y and Organism U were alive over the same time span. Organism W existed over a shorter period of time than Organism X

Aresearcher conducting behavioral research collects individually identifiable sensitive information about illicit drug use and other illegal behaviors by surveying college students. one of the subjects is in an automobile accident two weeks after participating in the research study. is this an example of an unanticipated problem that requires reporting to the irb? yes, this must be reported because it was not listed as a risk of study participation in the consent form (was unexpected) and the subject experienced harm.yes, this must be reported because it involved a subject in a research study and it’s up to the irb to determine if it was related to participation.no, this does not need to be reported because it was assessed by the researcher as unrelated to the research study.no, this does not need to be reported to the irb since the researcher reported it to the sponsor of the study.

Nami conducts an investigation on plants. she places a grow light on a timer to give the plants different amounts of light to see if this would affect their growth. in this investigation, the amount of light is the .

According to this map, which of these statements about cuban economic activity is true? a) coffee is not a valuable commodity in cuba. b) cattle ranching is found only in the western half of cuba. c) tobacco is grown in most areas of the country. d) manufacturing is limited to mostly the southern coast.