Concept:Young mammals have milk teeth, which do not include premolars.
Explanation:The diagram shows the adult dentition of the organism.
Adult dentition contains incisors, canines, premolars, and molars.
Milk dentition lacks premolars because they appear only in the adult set.
In the given diagram, the premolar is labelled
Y.
Therefore, the young of this organism does not have tooth
Y.
Answer:Y
