What does each mammal most likely eat?
The diagram shows sets of teeth found in two different
mammals.
OX: plant material
Y: plant material and meat
OX: plant material and meat
Y: meat
O X: meat
Y: plant material
O X: plant material
Y: meat

X: plant material

Y: meat

Explanation:

Just look at the molars: One is obviously for eating meat, as the jaws in the front are sharp and can easily shred meat. One is for chewing plants, as it's molars are flat.  

other information encoded in your genes might distinguish you from the others in the group