What are chemical contaminants? A. Homemade soaps
B. Restaurant grade cleaners
C. Alcohol
D. Recreational drugs

How could natural selection best be used to explain the evolution of the white fur of arctic fox

This anterior tooth has a single root and sharp incisal edges. it has mamelons upon eruptions. this tooth is a a. maxillary central incisor. b. mandibular central incisor. c. mandibular canine. d. maxillary lateral incisor.

The best time to go swimming is: a. directly after eating b. when you are feeling rested and energetic c. when you are feeling tired and sluggish d. a half hour after eating