Organism Physiology
Evolution of Organisms
For millions of years earth has gone under tremendous changes. This rapid change in environment, landscape and temperature alters the intact system and for surviving this change, a steady modification in living organisms occurs for adaption to surrounding environment. This change is never over night nor does it occur suddenly in newborns, it takes generations to evolve a new feature or characteristic. This adaption is not only in mammals but can also occur in plants and microscopic organisms; plants developed the process of photosynthesis in order to survive in oxygen abundant environment and micro-organisms being not used to access of oxygen either went extinct or formed symbiotic association with oxygen for survival.
The rule of survival of the fittest as determined by nature also applies to all living beings inhabiting earth. A simple example would be a breed of heavy coated sheep living in extreme hot conditions can either migrate to higher lands or be susceptible to resulting diseases that can wipe out an entire colony. Overtime this change can result in to newborns having a thinner coat for survival but such a change occurs over considerable time.
The most quoted example of a living thing adapting to changing environment is giraffe and through transformation of horse like neck into a long neck for survival.
An evolutionary theorist Jean-Baptist Lamarck described giraffe's evolution as a habit of reaching for tall trees to get fresher food (leaves) that resulted in longer forelegs then hind legs as consistently reaching for leaves high...
EVOLUTION What is evolutionary theory and what are causes of evolution and the evidence of evolution? The term 'evolution' evokes varied connotations. In simple and direct terms it is a process of change or development over a long period of time. Defined so, evolution can refer to any phenomena-- evolution of universe, evolution of human culture etc. -- that change over a period of time. However, in common parlance, evolution refers to
These developments have proven positive for the human species, allowing for greater nutritional variety and varieties of tastes: "Beginning with Mendel's study of peas, knowledge of genetics helped usher in scientific crop development, resulting in high-yielding varieties. Food production increased in every part of the world in the past few decades, including in Africa" (Prakash 2001). The idea humans are tampering with nature in an insidious manner through genetic modification
The function point-of-view fails to account for the presence of a femur in addition to processes from the pelvic bone. Altogether, these hind legs in this whale present for contemplation a most interesting instance of those significant parts in an animal -- rudimentary structures." [Struthers, p. 142-143] The dolphins breathe through their nose, but whales' nostrils drifted back farther and farther onto the top of the head in the fossils
Jerry Coyne's Why Evolution is True I understand it contradicts the account in the Bible and other holy texts, if one takes a literalist interpretive stance, but given that most texts have more significant internal conflicts, I did not see why this particular theory would cause people to have such visceral emotional responses. I understand, intellectually, that evolution is not the first scientific advance to be met with tremendous hostility;
The term mosaic evolution is used to describe the different features of an organism evolve at different rates. The efficient bipedal movement is a peculiarity that appeared very early and perhaps is the single most significant development in the emergence of man. Since this information is available from New Haven Teachers Institute, Yale, the information is accurate and reliable. Article-3. Skybreak, Ardea. Part 6D: The Two Biggest Leaps in Hominid
SummaryThe origin of life is an issue that attracted controversial debates for decades and been the subject of arguments in different fields. Evolutionism and creationism have attempted to answer this question by providing divergent perspectives about it. While creationism is largely influenced by religious beliefs and views, evolution is largely influenced by historical scientific evidence. Jerry Coyne seeks to demonstrate that evolution is true in its explanation of the origin
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