Question 2Before any research with nonhuman animals may begin, 1 pointthe research proposal must be approved by the IACUC.the animals must receive the appropriate vaccinations.the researchers must complete a trial with one animal subject to make sure it is not harmful. the research proposal must be approved by the IRB.

The correct answer is "the research proposal must be approved by the IACUC."

Here's why:

1. The Institutional Animal Care and Use Committee (IACUC) is a self-regulating entity that, according to U.S. federal law, must be established by institutions that use laboratory animals for research or instructional purposes to oversee and evaluate all aspects of the institution's animal care and use program.

2. Before any research with nonhuman animals may begin, the research proposal must be reviewed and approved by the IACUC. This is to ensure that the proposed research does not cause unnecessary or excessive harm to the animals and that the research is conducted in the most humane and ethical manner possible.

3. The other options are not necessarily required before the research can begin. While it's important for the animals to receive appropriate vaccinations, this is not a prerequisite for the research proposal to be approved. Similarly, conducting a trial with one animal subject to ensure the research is not harmful is not a requirement for approval.

4. The Institutional Review Board (IRB) is a committee that approves, monitors, and reviews biomedical and behavioral research involving humans to protect their rights and welfare. It does not have jurisdiction over research involving nonhuman animals.