The scientific name for a white oak is Quercus alba; the scientific name for a red oak is Quercus rubra. What does this tell you about the organism? A. White oaks are grouped in the genus Quercus. B. Red oaks are grouped in the genus alba. C. Red oaks are grouped in the species Quercus. D. White oaks are grouped in the same species category as red oaks.
Within the species names Quercus alba and Quercus rubra, Quercus indicates the genus. Therefore, both species of oak belong to the same genus. The only correct statement above therefore is A: 'White oaks are grouped in the genus Quercus'.
