What evidence would require a research biologist to revise the phylogenetic tree?

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review