Primate Classification
This primate group has a wet nose and often a toothcomb.
What are Strepsirrhines?
Strepsirrhines have a postorbital _____. Haplorhines have postorbital _____.
Bar; closure.
This is defined as a change in allele frequencies in a population over time.
This type of locomotion involves jumping between vertical supports like tree trunks.
Vertical clinging and leaping.
These lemurs engage in “stink fights” by rubbing scent glands on their tails and waving them at rivals.
What is a ring-tailed lemur?
This group includes monkeys, apes, and humans.
What are Haplorrhines?
This dental pattern, found in apes, includes five cusps arranged in a Y shape.
Y-5 molar pattern.
This evolutionary force introduces new genetic variation into a population and happens in the DNA level
What is 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 _____
fruit; sweet smell
These primates have downward-facing nostrils and live in Africa and Asia.
Name two cranial traits found in haplorhines but not in strepsirrhines
Postorbital closure and a fused mandibular symphysis.
This process occurs when individuals move between populations and exchange genes.
What is 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 by moving its head nearly 180 degrees.
What is a tarsier?
This group includes monkeys with broad noses pointing outward and often prehensile tails.
What are Platyrrhines?
Tarsiers share some traits with strepsirrhines. Name at least three traits they share with haplorhines.
A dry nose, postorbital closure, and no toothcomb.
This evolutionary force causes random changes in allele frequencies, especially in small populations.
What is genetic drift?
A primate has tall, sharp shearing crests and a complex gut to process fiber. What type of diet is it most likely adapted for?
What is Folivory? (leaves eater)
This primate is feared in Madagascar because of a belief that its long finger can curse or bring death.
What is an aye-aye?
This superfamily includes only apes and humans
What are hominoids?
Name at least six primate traits (morphology).
Grasping hands and feet, opposable digits, nails instead of claws, forward-facing eyes, stereoscopic vision, and a relatively large brain.
A sudden reduction in population size that leads to a loss of genetic variation is known as what?
A population bottleneck.
A primate is small but has tall, sharp molar cusps and a simple gut. What type of diet is it most likely adapted for?
Insectivory (eating insects)
This primate species is known for reducing social tension and resolving conflicts through sexual behavior rather than aggression. Why is this adaptive?
Bonobos. This behavior can reduce conflict and help maintain social bonds while avoiding injuries.