<span>No, it is unethical to perform this type of study. There are other ways of observing the behavior of students under stress in the lab. One way might be to have them take a test and tell them they failed and compare that group to a group of students that were told they passed the test. Another method would be to observe students that actually failed their tests.</span>
Answer:
In the East, adelgids attack eastern hemlock (Tsuga Canadensis) and Carolina hemlock (Tsuga carolinian). Both of these species, and any cultivars of these species, show little or no resistance to the insect. Many trees of these species have died. HWA made its way into Pennsylvania in 1973.
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This answer for this question would be answer choice B