The company claims that the mineral supplement can effectively precent the common cold a scientist disputes the claim saying an error exists in the groups for the investigation Which change to the investigation would remove the source of this error

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing