Biological Adaptation And Diversity

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Scientific method not only links to bigger contexts and objectives for this course, but also enhances our understanding the evolution in human populations. From race to cultural identities, scientific method greatly acknowledges the evolution of our biological adaptations and diversity. We put great emphasis on the scientific method because it never seeks for absolute, definite answers. Instead, it opens up new possibilities of stronger evidence to support the human evolution. With many hypotheses in mind, macroevolutionary patterns provide firm evidence of understanding the complexity of social adaptation and variation in human evolution. Although this is not always clear in speciation, diversified gradients and social adaptations such as …show more content…
Early hominins became to live in mixed environments, which consisted of water, rainforests, and grassy areas (Ackerman and Smith, 2007, p.78). A social niche reinforces species’ diet significantly and transition to a more terrestrial environment. Because of the change in species’ diet, their chewing patterns also advanced together over time and the digestive system became similar to human. This is a huge social benefit in the emergence of genus Homo because it opened up variety of food options and easier adaptation to any open environments. Both bipedalism and terrestrial omnivorous niche are crucial adaptations that evolved from series of speciation. This adaptation in the hominin lineage not only creates subpopulations with different population densities, but also forms wide dispersal to open …show more content…
Species go through several adaptations and variation genetically that fit their living conditions. In fact, scientific method emphasizes that a single answer cannot depict the whole picture of the biological evolution. The reproductive barriers and the spread of allele frequencies are based on the complex social adaptation. Over time, phenotypic traits and genetic variation seem to be heavily derived from the ancestors. Moreover, natural selection is a key microevolutionary force that is involved in every adaptation and mutations between species. According to Lovejoy (2009), “the ultimate source of any explication of human acumen must be natural selection” (p.9). Natural selection ensures genetic variation and polygenic traits that are necessary. For our several labs, we looked at multiple adaptive changes that occurred over time. General cranial differences and variation based on long term generational change within species gives better evidence about how human evolution evolved over the past two million years. Not only we see a major long-term trend, but also the way Homo sapiens received traits that hold solid roots from species such as the chimpanzees and the bonobos. DeWaal (1995) notes “humans diverged from bonobos and chimpanzees a mere eight million years ago” (p.84). Other than the divergence from the species,

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