Evolutionary biology has vanished from the list of acceptable fields of study for recipients of a federal education grant for low-income college students. The omission is inadvertent, said Katherine McLane, a spokeswoman for the Department of Education, which administers the grants. “There is no explanation for it being left off the list,” Ms. McLane said. “It has always been an eligible major.” Another spokeswoman, Samara Yudof, said evolutionary biology would be restored to the list, but as of last night it was still missing. If a major is not on the list, students in that major cannot get grants unless...