Question

Lab 5: Primate Features

Part 1: Distinguishing Primates from Other Mammals Skull A

Examine the pictures of the skulls provided and enter their characteristics in the table below.

	Orbit (Postorbital Bar, Closure, or Neither)	Eye Orientation (More Forwards or More Sideways)	Relative Brain Size (Large or Small)	Primate? (Yes or No)
Skull A
Skull B
Skull C

Answer 1

	Orbit	Eye Orientation	Relative Brain size
Skull A	post orbital closure	More forwards	Large
Skull B	post orbital closure	More forwards	Large
Skull C	Post orbital closure	More forwards	Large

-Post Orbital closure denotes to a plate of neural sheath that connects to eye with the primary head structure instead of a bar. This feature is found in higher primates. Here also there is presence of post orbital closure in each case.

-The vision of these skulls are more forwards as side vision ensures the eyes at lateral side like rabbits and dear. This is a very advanced characteristics found in primates.

- There are large brain size related to rest of the skull and other animals. Primates have large skull size accommodating larger brain. So all of these skulls are of primates.

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