生物进化被定义为在几代遗传下的群体中的任何遗传变化。这些变化可能很小或很大,很明显或不太明显。为了使事件被视为进化的实例,必须在群体的遗传水平上发生变化并且从一代传递到下一代。这意味着基因,或者更具体地说,群体中的等位基因发生变化并被传递。在群体的表型(可以看到的表达的物理性状)中注意到这些变化。人口基因水平的变化被定义为小规模变化,称为微进化。生物进化还包括所有生命都是连通的观念,并且可以追溯到一个共同的祖先。这称为宏观进化。生物进化不仅仅被定义为随时间变化。许多生物经历了随时间的变化,例如体重减轻或增重。这些变化不被视为进化的实例,因为它们不是可以传递给下一代的遗传变化。进化论是查尔斯达尔文提出的科学理论。科学理论基于观察和实验对自然发生的现象进行解释和预测。这种理论试图解释在自然界中看到的事件如何发挥作用。科学理论的定义不同于理论的共同含义,理论被定义为对特定过程的猜测或假设。相反,一个好的科学理论必须是可测试的,可证伪的,并且可以通过事实证据来证实。谈到科学理论,没有绝对的证据。这更像是确认接受理论作为特定事件的可行解释的合理性的情况。

英国剑桥大学生物学Assignment代写:生物进化

Biological evolution is defined as any genetic change in a population that is inherited over several generations. These changes may be small or large, noticeable or not so noticeable. In order for an event to be considered an instance of evolution, changes have to occur on the genetic level of a population and be passed on from one generation to the next. This means that the genes, or more specifically, the alleles in the population change and are passed on. These changes are noticed in the phenotypes (expressed physical traits that can be seen) of the population. A change on the genetic level of a population is defined as a small-scale change and is called microevolution. Biological evolution also includes the idea that all of life is connected and can be traced back to one common ancestor. This is called macroevolution. Biological evolution is not defined as simply change over time. Many organisms experience changes over time, such as weight loss or gain. These changes are not considered instances of evolution because they are not genetic changes that can be passed on to the next generation. Evolution is a scientific theory that was proposed by Charles Darwin. A scientific theory gives explanations and predictions for naturally occurring phenomena based on observations and experimentations. This type of theory attempts to explain how events seen in the natural world work. The definition of a scientific theory differs from the common meaning of theory, which is defined as a guess or a supposition about a particular process. In contrast, a good scientific theory must be testable, falsifiable, and substantiated by factual evidence. When it comes to a scientific theory, there is no absolute proof. It’s more a case of confirming the reasonability of accepting a theory as a viable explanation for a particular event.

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