| 
evolution — sometimes specified as “macroevolution” — refers to one basic type transforming into another. Textbooks often describe adaptations that have taken place in biology — small changes within certain species. This process of adaptation is sometimes called “microevolution.” This is an actual occurrence — a fact on which all scientists agree. A common error is made in scientific reasoning, unfortunately, when these adaptations (or microevolution) are used to assume that “macroevolution” (evolution from one basic type of living creature into another) also takes place. Each basic type of living creature has its own unique gene pool or genetic code. Basic types of animals are fairly readily recognized, and include the dog/wolf type, the elephant type, the chimpanzee type, the rat type, and so forth. All humans belong to the basic “human” type. Tiny variations may occur within our type, such as differences in eye color, hair distribution, and skin color in the case of humans. In the case of corn, varieties seem to have arisen over the years, including starch corn, flint corn, sweet corn, pod corn, popcorn, and dent corn. Macroevolution does not refer to such limited changes, changes which do not lead to a new basic type of plant or animal. EXCERPTS; 1. Breeding and artificial selection can accomplish only limited results. For example, an experiment was performed in France to increase the sugar content in table beets. In the beginning, the beets consisted of 6% sugar. After years of artificial selection, the sugar content increased to 17%. However, continued artificial selection did not succeed in further increasing the sugar content. 2. The creature remains the same basic type. Even with intense breeding and artificial selection, no fundamental change occurs in the creature. Scientific experiments can create horses with shorter hair, chickens that lay more eggs, and corn with higher protein content. But in each situation, limits are reached. The breeders still ended up with the same basic types of horses, chickens, and corn they had in the beginning. 3. Breeding and artificial selection often reduce survivability. Where modifications are made, the creature is usually weaker. It does not compete well with the original type. Falconer explains this well: “Our domesticated animals and plants are perhaps the best demonstration of the effects of this principle. The improvements that have been made by selection in these have clearly been accompanied by a reduction of fitness, for life under natural conditions, and only the fact that domesticated animals and plants do not live under natural conditions has allowed these improvements to be made.” one more time......
"Even though is difficult, I can still dream."
|