题目
题目

FA25 ANTHRO 105 001, 002 Laboratory Assignment 8: Primate origins

多重下拉选择题

Step 2 In the Eocene, there were two early primate groups represented by the fossil record: omomyids and adapids.   Examine the adapid specimens (Adapis Links to an external site. and Notharctus Links to an external site. ) to determine which of the following traits adapids have. Both specimens will share all the same traits so it doesn't matter which you pick. Traits State Post-orbital Bar, Post-orbital Closure, or Neither? [ Select ] Post-orbital Closure Post-orbital Bar Neither Forward facing eyes? [ Select ] Yes No Are the incisors long/skinny or short/stout? [ Select ] Long/skinny Short/stout Grasping hands? [ Select ] Yes No Claws, Nails, or Neither? [ Select ] Claws Nails Neither

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Question restatement: Step 2 presents a comparison of adapid traits (Adapis and Notharctus) from the Eocene. You are to fill five dropdowns with traits: Post-orbital Bar, Post-orbital Closure, or Neither; Forward facing eyes? Yes/No; Incisors length: Long/skinny or Short/stout; Grasping hands? Yes/No; Claws, Nails, or Neither? Claws/Nails/Neither. The provided answer selections are: Post-orbital Bar; Yes; Short/stout; Yes; Nails. Option 1: Post-orbital Bar - Why this aligns with adapids: Adapids are early primates within the larger primate lineage that, unlike anthropoids, typically show a post-orbital bar rather than post-orbital closure. The post-orbital bar is a bony rim that partially encloses the eye socket, which is characteristic of many early primates and strepsirrhine-like taxa. This trait supports a more primitive, non-closure condition. - Why this reasoning fits the question: The prompt asks you to identify traits that adapids have; selecting Post-orbital Bar matches the expected skul......Login to view full explanation

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