Some fossils provide evidence to suggest that Earth's climate has changed over time. What information can scientists obtain from these fossils? temperatures number of species that existed movement of continents cause of mass extinctions

Which of the following studies is linked most directly to the establishment of the national research act in 1974 and ultimately to the belmont report and federal regulations for human subject protection? a. the public health service tuskegee study of untreated syphilis in the negro male.b. stanford prison experiment (zimbardo).c. tearoom trade study (humphreys).d. the harvard t3 study.