Featured Article Quiz #153
Rodent
#1 Which feature most characterizes rodents?
Continuously growing, sharp incisors in both the upper and lower jaws
Long, fixed canines used for tearing food
Bony plates instead of incisors for grinding vegetation
#2 Why do rodent incisors stay chisel-shaped over time?
Front enamel wears slower than softer back enamel, so teeth wear into a chisel shape
Enamel covers both front and back evenly, causing the teeth to remain flat
The incisors stop growing after they reach a fixed length
#3 Which statement about rodents is correct based on the text?
They are the only land placental mammals to reach Australia and New Guinea without humans
They live only in Antarctica and a few remote islands
All rodents are solitary and never live in colonies