eukaryotes

简明释义

英[juːˈkær.i.oʊts]美[juˈkɛr.i.oʊts]

n. [生物]真核生物；真核细胞（eucaryote 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.The two component system is a signal transduction pathway in both of the prokaryotes and eukaryotes.

双组分系统是广泛存在于原核和真核细胞中的信号转导系统。

2.Theory that introns were present in early life forms and were retained by eukaryotes, but lost by prokaryotes.

认为内含子在早期生命形式中即存在并被真核生物保留而被原核生物丢失的理论。

3.Mitochondria are the sites of aerobic respiration, and generally are the major energy production center in eukaryotes.

线粒体是有氧呼吸的场所，同时也是真核生物主要的能量产生中心。

4.But there are some important caveats: it counts only the eukaryotes, that is, critters with relatively complex cells.

但需要特别注意的是：他只是统计了真核生物，也就是那些细胞相对复杂的动物，而把细菌以及古生菌排除在外了。

5.The most familiar domain, though arguably not the most important to the Earth's overall biosphere, is the eukaryotes.

最为熟知的应当是真核域，尽管对于地球生物圈而言，它可能并不是最重要的部分。

6.Archaeans have cell membranes that are completely different from both bacteria and eukaryotes.

古生菌还具有完全与细菌和真核生物不同的细胞膜。

7.Plants, animals, and fungi are all examples of eukaryotes.

植物、动物和真菌都是真核生物的例子。

8.Single-celled organisms such as yeast are classified as eukaryotes.

像酵母这样的单细胞生物被归类为真核生物。

9.The study of eukaryotes has advanced significantly in recent years.

近年来，对真核生物的研究取得了显著进展。

10.Many eukaryotes reproduce sexually, which increases genetic diversity.

许多真核生物通过有性繁殖，这增加了遗传多样性。

11.Unlike bacteria, eukaryotes have a defined nucleus.

与细菌不同，真核生物具有明确的细胞核。

作文

In the vast realm of biology, the classification of living organisms is crucial for understanding the diversity of life on Earth. Among the various categories, one of the most significant is the group known as eukaryotes, which includes a wide range of organisms from single-celled amoebas to complex multicellular beings like humans. The term eukaryotes refers to organisms whose cells contain a nucleus and other organelles enclosed within membranes. This characteristic sets them apart from prokaryotes, which are simpler organisms that lack a defined nucleus. The study of eukaryotes is essential for several reasons, including their evolutionary significance, ecological roles, and implications for human health.Firstly, eukaryotes play a vital role in the evolutionary history of life. It is believed that they emerged from prokaryotic ancestors through a process called endosymbiosis, where one cell engulfed another, leading to a symbiotic relationship. This event marked a significant turning point in evolution, allowing for greater complexity and specialization within organisms. The diversity of eukaryotes is astounding; they can be found in various environments, from the deepest oceans to the highest mountains, showcasing their adaptability and resilience.Moreover, eukaryotes are integral to ecosystems. They include plants, animals, fungi, and protists, each playing unique roles in their respective habitats. For instance, plants, which are eukaryotes, are crucial for photosynthesis, converting sunlight into energy and producing oxygen as a byproduct. Animals, also classified as eukaryotes, contribute to food webs and nutrient cycling. Fungi, another group of eukaryotes, are essential decomposers, breaking down organic matter and returning nutrients to the soil. This interconnectedness highlights the importance of eukaryotes in maintaining ecological balance.In addition to their ecological significance, eukaryotes have profound implications for human health. Many diseases are caused by pathogenic eukaryotes, such as fungi and protozoa. Understanding the biology of these organisms is crucial for developing effective treatments and preventive measures. Furthermore, beneficial eukaryotes, such as certain bacteria and yeast, are utilized in biotechnology and medicine. For example, yeast is used in fermentation processes to produce bread, beer, and wine, while genetically modified eukaryotes are being researched for their potential to produce insulin and other therapeutic proteins.In conclusion, the study of eukaryotes is vital for understanding the complexity of life on Earth. Their evolutionary history, ecological roles, and impact on human health underscore their significance in the biological sciences. As we continue to explore the intricacies of eukaryotes, we gain valuable insights into the mechanisms that sustain life and the challenges we face in preserving biodiversity. Ultimately, recognizing the importance of eukaryotes can lead to better conservation efforts and improved health outcomes for humanity.

在生物学的广阔领域中，生物分类对于理解地球上生命的多样性至关重要。在各种类别中，最重要的之一是被称为真核生物的群体，它包括从单细胞变形虫到复杂的多细胞生物如人类等广泛的生物。术语真核生物指的是细胞内含有细胞核和其他被膜包裹的细胞器的生物。这一特征将它们与缺乏明确细胞核的更简单的原核生物区分开来。研究真核生物至关重要，原因有很多，包括它们的进化意义、生态角色以及对人类健康的影响。首先，真核生物在生命的进化历史中发挥着重要作用。人们相信，它们是通过内共生过程从原核生物祖先中演化而来的，在这一过程中，一个细胞吞噬了另一个细胞，导致了共生关系的形成。这一事件标志着进化的重大转折点，使得生物体能够实现更大的复杂性和专业化。真核生物的多样性令人惊叹；它们可以在从最深的海洋到最高的山脉等各种环境中找到，展示了它们的适应性和韧性。此外，真核生物在生态系统中至关重要。它们包括植物、动物、真菌和原生生物，每种生物在各自的栖息地中发挥独特的作用。例如，植物，作为真核生物，对于光合作用至关重要，将阳光转化为能量并产生氧气作为副产品。动物，同样被归类为真核生物，对食物链和养分循环做出贡献。真菌，另一类真核生物，是重要的分解者，分解有机物并将养分返回土壤。这种相互联系突显了真核生物在维持生态平衡中的重要性。除了它们的生态重要性外，真核生物对人类健康也有深远的影响。许多疾病是由致病的真核生物引起的，如真菌和原生生物。了解这些生物的生物学对于开发有效的治疗和预防措施至关重要。此外，某些有益的真核生物，如某些细菌和酵母，被用于生物技术和医学中。例如，酵母被用于发酵过程，以生产面包、啤酒和葡萄酒，而转基因的真核生物正在被研究以其生产胰岛素和其他治疗蛋白的潜力。总之，研究真核生物对于理解地球上生命的复杂性至关重要。它们的进化历史、生态角色以及对人类健康的影响突显了它们在生物科学中的重要性。随着我们继续探索真核生物的复杂性，我们获得了关于维持生命机制和我们在保护生物多样性方面面临的挑战的宝贵见解。最终，认识到真核生物的重要性可以促进更好的保护工作和改善人类的健康结果。