Critical Reasoning (CR) | Re: Ornithologist: the curvature of the claws of the modern tree-dwelling

Ornithologist: the curvature of the claws of the modern tree-dwelling birds enables them to perch in trees. The claws of Archeopteryx, the earliest known birdlike creature, show similar curvature that must have enabled the creature to perch on tree limbs. Therefore, Archeopteryx was probably a tree-dwelling creature.

Paleontologist: No, the ability to perch in trees is not good evidence that Archeopteryx was a tree-dwelling bird. Chickens also spend time perched in trees, yet chickens are primarily ground-dwelling.

Which one of the following is an assumption on which the ornithologist’s reasoning depends?

(A) Modern tree-dwelling birds are the direct descendants ofArcheopteryx . - WRONG. Absolutely not.

(B) Archeopteryx made use of the curvature of itsclaws .  - CORRECT. If they didn't perching is quesitonable then.

(C) There have never been tree-dwelling birds without curvedclaws . - WRONG. Situation reversed which is not necessarily true.
 
(D) Archeopteryx was in fact the
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Statistics : Posted by unraveled • on 07 Apr 2020, 04:55 • Replies 3 • Views 3450

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