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, …show more content…
Nonetheless, developing scientific inquiries and hypotheses still cannot lead to absolute or unambiguous truth. According to Popper (1963), falsification allows hypotheses to predict results instead of truth. Having a falsifiable hypothesis is important in science because it improves any subjective opinions. In human evolution, scientific inquiries combine the existing knowledge and new phenomena, which does not prove anything for sure. Thus, science is always open to new discoveries and can change any time regarding the human evolution. Weiner (1994) states, “biologists are observing year by year and sometimes even day by day or hour by details of life’s unrolling and opening” (p.9). Through technology, humans adapt and advance to fit into their environment. This advancement applies to the scientific field as new observations come out that could contradict past hypotheses. For every labs and essays, we came up with a hypothesis based on our observation or data collection. Although these hypotheses were useful in understanding the concepts or generalized information, it never settled as a final answer. This shows why scientific method is used to advance our knowledge and understanding of the biological evolution and diversity in humans, but it does not lead to absolute truth. Since modern synthesis provides