Primate Classification
This primate group has a wet nose and often a toothcomb.
What are strepsirrhines?
Tarsiers share some traits with strepsirrhines; name 3 traits they share with haplorrhines.
Loss of rhinarium (wet nose)
Absence of a toothcomb
Postorbital closure
This is defined as a change in allele frequencies in a population over time.
Evolution
This type of locomotion involves jumping between vertical supports like tree trunks.
What is vertical clinging and leaping?
These lemurs engage in “stink fights” by rubbing scent glands on their tails and waving them at rivals.
ring-tailed lemurs
This group includes monkeys, apes, and humans.
What are haplorrhines?
Strepsirrhines have post orbital _______
Haplorrhines have post orbital _______
1) Bar
2) closure
This evolutionary force introduces new genetic variation into a population
Mutation
This locomotion involves arm-swinging beneath branches and is seen in gibbons.
What is brachiation?
Your professor Ana went to Madagascar and found out that lemurs smell like ________
fruits!! so sweet.
These primates have downward-facing nostrils and live in Africa and Asia?
Catarrhines
This dental pattern, found in apes, includes five cusps arranged in a Y shape.
Y-5 pattern
This process occurs when individuals move between populations and exchange genes.
Gene flow
A primate with low, rounded molars is most likely adapted to this type of diet.
What is frugivory?
This primate has eyes so large that they cannot move in their sockets, so it compensates with the ability of moving their head 180 degrees
Tarsiers
This group includes monkeys with broad noses pointing outward and often prehensile tails
What are platyrrhines?
Name TWO cranial traits that are found in haplorrhines but not in strepsirrhines.
What are a fused mandible and frontal bone fusion?
This evolutionary force causes random changes in allele frequencies, especially in small populations.
Genetic drift
A primate has tall, sharp molar cusps and a simple gut. What type of diet is it most likely adapted for?
Insectivory
This primate is feared in Madagascar because of a belief that its long finger can curse or bring death.
Aye-Aye
This superfamily includes apes and humans.
What is Hominoidea?
Name at least 6 primate traits (morphology)
1- Grasping abilities - opposable thumbs
2- Big brains
3- Forward-facing eyes
4- Post orbital closure/bar
5- Nails not claws
6 - Dental formula 2123
A sudden reduction in population size that leads to loss of genetic variation is known as:
Bottleneck effect
If a primate has sharp shearing crests, what does this suggest about the selective pressures it experienced?
What is selection for leaf consumption (folivory)?
This primate species is known for reducing social tension and resolving conflicts through sexual behavior rather than aggression; why is it adaptive?
bonobos