What must be true if prokaryotes evolved into eukaryotes by endosymbiosis

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Which of the following is a testable hypotheses?

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