What do evolutionary biologists study?
a. the differences between microevolution and macroevolution
b. phenotypic changes due to the environment
c. genetic changes within and among populations
d. the fossil record and geologic time

Which best describes the“brain trust” franklin roosevelt promised to make part of his administration? a group of america’s most successful businessmen, who would fix the economya group of hoover’s economic advisers, who would undo previous damage to the economya group of smart advisers, who would assist roosevelt in guiding the nation forwarda group of military veterans, who would assist roosevelt in putting americans back to work