47)
Sample Earthworms Humus(decomposed organic matter excreted by earthworms) Water retention Plant growth
1 Absent Absent Moderate Moderate
2 Present Rich in humus High High

William compared two soil samples to check soil’s ability to support the growth of plants. He had read that plants grow best in soil rich in humus. The experimental data is summarized in the table.

What conclusion can be BEST drawn from the data?
A) Soils rich in humus improve plant growth.
B) Earthworms do not improve the soil’s humus content.
C) Plants will not grow in soils that do not have earthworms.
D) The growth of plants is poor in soil that has decomposed organic matter.

The ideal that all people should be treated equally. a. rule of law b. representative government c. limited government the bill of rights and the declaration of rights both seek to protect a. the separation of powers b. personal liberties c. representative government

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.

How has congress added to the president’s role as chief economic planner over the years?