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Which row shows the group of characteristics that best reflects the trends in hominin evolution from the australopithecus species to the Homo species? Characteristics 1 - VCE - SSCE Biology - Question 33 - 2019 - Paper 1
Question 33
Which row shows the group of characteristics that best reflects the trends in hominin evolution from the australopithecus species to the Homo species? Characteristi... show full transcript
Worked Solution & Example Answer:Which row shows the group of characteristics that best reflects the trends in hominin evolution from the australopithecus species to the Homo species? Characteristics 1 - VCE - SSCE Biology - Question 33 - 2019 - Paper 1
Step 1
Characteristics identifying trends in human evolution
Answer
When considering the evolutionary trends from Australopithecus to Homo, the characteristics that show a noticeable shift include:
- Tooth size decreases, reflecting a change in diet towards more processed food.
- Brow ridges tend to increase in size in the Homo lineage, indicating stronger muscle attachment for chewing as diet changes.
- Pelvic shape moves towards a more bowl-shaped structure, accommodating bipedal locomotion.
- Zygomatic arch size may also change as the face becomes flatter through evolution.
Based on these characteristics, the row that accurately represents the trends is:
- Row 1: decreasing tooth size, increasing size of brow ridges, increasingly bowl-shaped pelvis, increasing size of zygomatic arch.