Question

Sagital crest - crest of bone across the top of the skull yes or no

Facial Prognathism - protruding jaw yes or no

Browridges - bony protrusion above eyes Yes or no

Post-orbital constriction - constriction of cranium behind eye orbits Yes or no

Location of eye socket - placement of eyes forward or to the side

Dental formula 2-1-3-3 or 2-1-2-3

Projecting canines - large, long canine teeth projecting beyond tooth row yes or no

Diastema - gap in tooth row to allow for projecting canines yes or no

Characteristic	Gorilla	Homo Erectus	Homo sapien
sagital crest
facial prognathism
brow ridges
post-orbital constriction
location of eye socket
dental formula
projecting canines
diastema

Gorilla

Homo erectus

Homo sapien

Answer 1

Sagital crest - crest of bone across the top of the skull yes or no

Ans:No, A sagittal crest is a ridge of bone running lengthwise along the midline of the top of the skull (at the sagittal suture) of many mammalian and reptilian skulls, among others.

Facial Prognathism - protruding jaw yes or no

Ans:Yes

Browridges - bony protrusion above eyes yes or no

Ans: No,The brow ridge, or supraorbital ridge known as superciliary arch in medicine, refers to a bony ridge located above the eye sockets of all primates.

Post-orbital constriction - constriction of cranium behind eye orbits Yes or no

Ans: Yes,In physical anthropology, post-orbital constriction is the narrowing of the cranium (skull) just behind the eye sockets (the orbits, hence the name) found in most non-human primates and early hominins.

Location of eye socket - placement of eyes forward or to the side

Ans: Yes

Dental formula 2-1-3-3 or 2-1-2-3

Ans: 2-1-2-3, the formula 2.1.2.3 for upper teeth indicates 2 incisors, 1 canine, 2 premolars, and 3 molars

Projecting canines - large, long canine teeth projecting beyond tooth row yes or no

Ans: Yes

Diastema - gap in tooth row to allow for projecting canines yes or no

Ans: Yes

Characteristic	Gorilla	Homo Erectus	Homo sapien
sagital crest	In extant primates, prominent sagittal crests are found primarily in male gorillas and orangutans, the two largest living primate species, which is consistent with the notion that sagittal crests serve the purpose of providing a more extensive muscle attachment area in large‐bodied individuals.	Sagittal keels occur in several early human species, most noticeably in Homo erectus, occasionally in Homo heidelbergensis and in some Upper Paleolithic Homo sapiens specimens.	The massive face was flat or concave with no forehead. A very large sagittal crest (a ridge of bone running along the top of the skull) and other heavily reinforced areas of the skull would have provided strong points of attachment for chewing muscles.
facial prognathism	Strong	Mild	Mild
brow ridges	gorilla brow ridges are continuous and straight, and stick out over their eyes	this feature reached its maximum size	In Homo sapiens sapiens (modern humans) the eyebrows are located on their lower margin.brow ridge is limited
post-orbital constriction	very noticeable	even less	completely disappears
location of eye socket	Gorilla eyes suddenly popped wide opened then rolled around and around in their eye sockets. The eyeballs rotated in different directions slower and slower until they stopped.	A prominent brow ridge was present over the eye sockets	Orbits (eye sockets) are square rather than round
dental formula	incisor 2/2, canine 1/1, premolar 2/2, molar 3/3) × 2 = 32.	2.1.2.32.1.2.3	teeth are relatively small compared with earlier species. This is especially noticeable in the front incisor and canine teeth.dental formula2-1-2-3
projecting canines	Gorillas have 32 teeth — the same number as humans. Gorillas have large strong teeth adapted for the coarse vegetation they consume. Adult males develop big, sharp canines as they mature.	Rear teeth of Paranthropus increased in size while the incisors and canines shrank	Mild
diastema	The dental arcade is the shape made by the rows of teeth in the upper jaw. Apes have a much more U shaped dental arcade while humans have more V shaped dental arcade. Apes have a gap known as the diastema between the upper incisors and canines. This gap accommodates the enlarged lower canines.	The dental arcade is smaller than that of australopithecine species and following the trend, prognathism was reduced within the species. Earlier Homo erectus species exhibited larger teeth than Homo sapiens do today, but the teeth are smaller than early Homo species.[The incisors also begin to show the shovel-shaped appearance, which can be attributed to a change towards a hunter-gatherer diet.The reduction in molar size has been linked to the eating of softer foods, including cooked foods as well as more meat.	General characterizing feature of the dental morphology of humans are the lack of facial prognathism, a parabola-shaped mandible and maxilla, and molars that are the same sie as the front teeth