| the quantity of each type of tooth (incisor,
canine, premolar, and molar) in each quadrant of the mouth, counting from
the front. The human dental formula is 2.1.2.3. The Old World monkeys and
apes also share this dental formula. |
 |
| fingers and toes. See pentadactylism. |
| visual messages, or body language, used by primates and
other animals primarily to communicate anger, fear, and other basic emotions.
Displays are a strong indication of an animal's emotional state. |
| being awake and active during the daylight hours but
sleeping during the night time. See nocturnal and crespecular. |
| a large organic molecule that stores the
genetic code for the synthesis of proteins. DNA is composed of sugars, phosphates
and bases arranged in a double helix shaped molecular structure. Segments
of DNA in chromosomes correspond to specific genes. |
| Primate societies usually have hierarchies-each adult
member has a rank. Both males and females have dominance hierarchies. They
vary in stability and linearity. |