Twenty days after conception, implantation occurs

The intelligence test data from World War I recruits indicated that whites scored higher than all other groups

a. True b. False

Jamal is preparing to clean his oven when he accidentally sprays himself in the eyes with oven cleaner. The caustic chemical damages the outside covering of his eyes where the light enters. Jamal has most likely injured his ____

a. ?iris b. ?lens c. ?cornea d. ?fovea