Respuesta :
The Primate A is having short broad pelvis or bowl shaped pelvis therefore is biped.
What is primate?
Haplorrhines and Strepsirrhines are the two subgroups of primates. The words for haplorrhine and strepsirrhine respectively mean dry and wet nose. The dry-nosed primates known as haplorrhines include tarsiers, apes, monkeys, and humans. Haplorrhines are divided into three groups:
1) the catarrhines, which include humans, apes, and monkeys from the old world;
2) the platyrrhines, which include South American monkeys; and
3) tarsiers. Tarsiers can only be found in South East Asia, while apes can be found in both South East Asia and Africa.
What is skeletal material?
Bone, antler, ivory, teeth, and horn are all examples of skeletal materials, which are organics primarily made up of hydroxyapatite and collagen in varying amounts. One must first look for a porous surface or a distinctive shape to determine whether a substance is skeletal.
Primate A is having short broad pelvis or bowl shaped pelvis therefore is biped.
Following are the adaptations seen in this primate's pelvis that indicate bipedal locomotion.
1) Primate has has bowl shaped pelvis which helps in holding up the internal organs and upper body weight for upright locomotion and brought the vertebral column closer to the hip joint, providing a stable base for support of the trunk while walking upright.
2) In primates the ilium evolved from long and narrow shape to a short and broad one and the walls of the pelvis evolved to face laterally. These evolution increased area for the gluteus muscles to attach and helps to stabilize the torso while standing on one leg.
3)The sacrum evolved to become more broad which led to increase in the diameter of the birth canal and making birthing easier.
Therefore, Primate A is having short broad pelvis or bowl shaped pelvis therefore is biped.
Learn more about primate from the given link.
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