Question

A fossil of a new primate species is discovered. Scientists hypothesize that the species traveled long distances without putting their hands down on the ground, and used tools. If this hypothesis is true, which trait would the fossil most likely have?

Answer 1

The fossil would likely have pelvic and leg bone structures adapted for bipedal locomotion, hand and forearm bones indicating dexterity, and an increased brain size for cognitive functions related to tool use.

Step-by-step explanation:

If the hypothesis is true that a newly discovered fossil of a primate species traveled long distances without using hands and used tools, we should expect certain anatomical traits to be evident in the fossil record. These traits include pelvic and leg bone structures adapted for efficient bipedal locomotion, suggesting the ability to walk upright for extended distances. Additionally, there would likely be changes in the hand and forearm bones indicating dexterity and a repositioning of the thumb, similar to Homo habilis, which had hands capable of making tools. Furthermore, they might have a larger brain size to support higher cognitive functions necessary for tool use, much like early Homo species that displayed increases in brain volume compared to their ancestors.

Answer 2

B - A curve in the lumber region of the spine