Question

Sagittal Crests in Humans vs. NHAs

Option 1: Humans have sagittal crests.
Option 2: NHAs have sagittal crests.
Option 3: Sagittal crests are related to language.
Option 4: Sagittal crests are associated with fashion choices.

Answer 1

Sagittal crests are bony ridges found in some human ancestors but not in modern humans. They serve as attachment sites for strong jaw muscles.

Step-by-step explanation:

Sagittal crests are bony ridges that run along the top of the skull, from the front to the back. They are found in some human ancestors, such as Homo erectus, but not in modern humans. Sagittal crests serve as attachment sites for large chewing muscles, indicating a diet that required strong jaw muscles. Humans do not have sagittal crests, while some non-human ancestors, like Homo erectus, did have sagittal crests.