polyphyletic

简明释义

英[ˌpɒlɪfaɪˈletɪk]美[ˌpɑlifaɪˈletɪk]

adj. [生物] 多源的

英英释义

单词用法

同义词

反义词

例句

1.The results revealed that: 1. The Myriapoda are polyphyletic.

结果表明：1、多足类是复系发生的。

2.The current Oxyinae is not a monophyletic group, and should be a polyphyletic group.

现行的稻蝗亚科并非一单系群，而是一多系群。

3.The current Oxyinae is not a monophyletic group, and should be a polyphyletic group.

现行的稻蝗亚科并非一单系群，而是一多系群。

4.Some plant families are considered polyphyletic 多系的 because they include species from different evolutionary backgrounds.

一些植物科被认为是polyphyletic 多系的，因为它们包含来自不同进化背景的物种。

5.The classification of certain animal groups has been revised due to their polyphyletic 多系的 nature.

由于某些动物群体的polyphyletic 多系的特性，分类已经被修订。

6.The term polyphyletic 多系的 is often used to describe groups that arise from multiple ancestral sources.

术语polyphyletic 多系的常用于描述来自多个祖先来源的群体。

7.Researchers discovered that the old classification of birds was polyphyletic 多系的 and did not accurately represent their lineage.

研究人员发现，旧的鸟类分类是polyphyletic 多系的，并未准确代表它们的谱系。

8.In modern taxonomy, we aim to avoid polyphyletic 多系的 classifications that do not reflect true evolutionary relationships.

在现代分类学中，我们旨在避免不反映真实进化关系的polyphyletic 多系的分类。

作文

In the study of biology, classification is a crucial aspect that helps scientists understand the relationships between different organisms. One term that often arises in this context is polyphyletic, which describes a group of organisms that do not share an immediate common ancestor. This concept is essential for biologists as it highlights the complexity of evolutionary relationships and the importance of accurate classification. To better understand the implications of polyphyletic groups, we can explore several examples and their significance in the field of taxonomy.A classic example of a polyphyletic group is the classification of flying animals such as birds, bats, and insects. At first glance, one might assume that these creatures belong to a single category due to their ability to fly. However, upon closer examination, it becomes clear that these animals do not share a common ancestor that possessed the ability to fly. Instead, flight has evolved independently in these different lineages through a process known as convergent evolution. This phenomenon illustrates how polyphyletic classifications can misrepresent the true evolutionary relationships among organisms, leading to confusion in understanding their biological history.Another significant example of polyphyletic classification is seen in the grouping of certain plants. For instance, the term 'gymnosperms' refers to a variety of seed-producing plants that do not form flowers. While gymnosperms are often categorized together, they are not derived from a single common ancestor. Instead, this group includes diverse lineages, such as conifers, cycads, and ginkgoes, each with distinct evolutionary paths. This polyphyletic nature of gymnosperms emphasizes the necessity of revising classification systems to reflect more accurately the evolutionary history of these plants.The recognition of polyphyletic groups has significant implications for scientific research and conservation efforts. For instance, when developing conservation strategies, understanding the evolutionary relationships among species can help prioritize efforts to protect biodiversity. If a conservation program were to focus solely on a polyphyletic group without recognizing its evolutionary complexities, it could inadvertently neglect other species that share a closer genetic relationship and are more at risk of extinction.Furthermore, the concept of polyphyletic groups challenges traditional views of taxonomy, urging scientists to adopt a more nuanced approach. Modern techniques, such as molecular phylogenetics, allow researchers to analyze genetic data and construct more accurate evolutionary trees. These advancements enable scientists to identify polyphyletic groups and reclassify organisms based on their true evolutionary relationships rather than superficial similarities.In conclusion, the term polyphyletic plays a vital role in the field of biology, particularly in the classification of organisms. By recognizing the existence of polyphyletic groups, scientists can gain deeper insights into the complexities of evolution and improve their understanding of biodiversity. As research continues to evolve, it is crucial for taxonomists to consider these relationships to create a more accurate and meaningful classification system. Ultimately, the study of polyphyletic groups not only enhances our knowledge of the natural world but also informs conservation efforts aimed at preserving the rich tapestry of life on our planet.

在生物学研究中，分类是一个至关重要的方面，它帮助科学家理解不同生物之间的关系。一个常常出现的术语是polyphyletic，它描述了一组不共享最近共同祖先的生物。这个概念对生物学家来说至关重要，因为它突显了进化关系的复杂性以及准确分类的重要性。为了更好地理解polyphyletic组的含义，我们可以探索几个例子及其在分类学领域的重要性。一个经典的polyphyletic组的例子是飞行动物的分类，例如鸟类、蝙蝠和昆虫。乍一看，人们可能会假设这些生物由于能够飞行而属于同一类别。然而，仔细观察后，会发现这些动物并不共享一个拥有飞行能力的共同祖先。相反，飞行在这些不同谱系中独立进化，经过一个称为趋同进化的过程。这种现象说明了polyphyletic分类如何误导真实的进化关系，从而导致对生物历史的理解产生混淆。另一个重要的polyphyletic分类例子出现在某些植物的分组中。例如，术语“裸子植物”指的是一类不形成花的种子植物。虽然裸子植物通常被归类在一起，但它们并不是源自单一的共同祖先。相反，这一组包括多样的谱系，如松柏类、苏铁类和银杏类，每个谱系都有不同的进化路径。这种裸子植物的polyphyletic特性强调了修订分类系统以更准确地反映这些植物的进化历史的必要性。识别polyphyletic组对科学研究和保护工作具有重要意义。例如，在制定保护策略时，了解物种之间的进化关系可以帮助优先考虑保护生物多样性的工作。如果一个保护项目仅关注一个polyphyletic组，而没有认识到其进化的复杂性，它可能无意中忽视其他共享更近遗传关系且面临更高灭绝风险的物种。此外，polyphyletic组的概念挑战了传统的分类观点，促使科学家采用更细致的方法。现代技术，如分子系统发育学，使研究人员能够分析基因数据并构建更准确的进化树。这些进展使科学家能够识别polyphyletic组，并根据其真实的进化关系而非表面的相似性重新分类生物。总之，术语polyphyletic在生物学领域中扮演着至关重要的角色，特别是在生物的分类中。通过认识到polyphyletic组的存在，科学家可以深入了解进化的复杂性，并提高对生物多样性的理解。随着研究的不断发展，分类学家必须考虑这些关系，以创建一个更准确和有意义的分类系统。最终，研究polyphyletic组不仅增强了我们对自然世界的知识，还有助于指导旨在保护我们星球上丰富生命的保护工作。