Theria Flashcards
1
Q
What did the Theria evolve from ?
A
The Trituberculata
2
Q
Which group of mammals didn’t evolve from the Trituberculata ?
A
The Monotremes
3
Q
What is a Tribospheric cheek tooth pattern ?
A
Where one cusp on the molar is prominent
4
Q
What is the cheek tooth pattern of modern day humans ?
A
We have 4 cusps on each molar
5
Q
What is the advantage of a Tribospheric cheek tooth pattern ?
A
Improved efficiency In cutting and crushing insects
6
Q
Which organism still have the Tribospheric cheek tooth pattern ?
A
Primitive marsupials and Placentalia (eutherians)
7
Q
What links Trituberculates, marsupials and Placentalia (Eutherians)?
A
Similarities in tooth structure.
