OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Smaller brain size, increasing jaw size, and broad forhead
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Increasing body size, thick skulls, and large brow bone.
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Decreasing brain size, large canines, and thick skulls.
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Bipedalism, increasing brain size, and use of tools.
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Detailed explanation-1: -Three other trends are important in the evolution of hominins: bipedalism, non-honing chewing complex, and encephalization of the brain.
Detailed explanation-2: -The four trends of hominin evolution are civilization, evolving terrestrially, a large brain, and bipedalism. Bipedalism refers to the ability to walk upright on two feet. This ability increased over time. An excellent example of species in this trend is the Ardipithecus.
Detailed explanation-3: -Human brain size nearly quadrupled in the six million years since Homo last shared a common ancestor with chimpanzees, but human brains are thought to have decreased in volume since the end of the last Ice Age. The timing and reason for this decrease is enigmatic.
Detailed explanation-4: -As early humans faced new environmental challenges and evolved bigger bodies, they evolved larger and more complex brains. Large, complex brains can process and store a lot of information. That was a big advantage to early humans in their social interactions and encounters with unfamiliar habitats.