eukaryote

简明释义

英[jʊˈkærɪəʊt]美[jʊˈkæriot;jʊˈkæriət]

n. 真核细胞（等于 eucaryote）

英英释义

单词用法

同义词

反义词

例句

1.Grypania may have been either a bacterial colony or a eukaryote - an organism with specialized cells, enclosed in a membrane.

卷曲藻可能是一个菌落，或者一种真核生物——其包裹在细胞膜内的细胞功能已经出现分化的生物体。

2.The family of zinc finger proteins is an important member of transcription factors which exists widely in prokaryote and eukaryote.

锌指蛋白是一类广泛存在于原核和真核生物体中的重要转录调控因子，在动植物的生长发育过程中均起着重要作用。

3.Abstract : Polyamines(putrescine, spermidine, spermine) are growth factors in both prokaryote and eukaryote.

摘要 ：多胺（腐胺、精胺、亚精胺等）是原核生物和真核生物的生长因子。

4.So mouse ERA protein may play important role in eukaryote cell cycle.

所以，鼠era蛋白在细胞周期中发挥重要作用。

5.The paper has summarized development of biochemical component and ultrastructure of heterochromatin in eukaryote with an introduction to the development of ultrastructure in centromere.

概述了异染色质生化组成及其在超微结构方面的研究进展，着重介绍了着丝粒的异染色质超微结构研究。

6.Scientists now know that this common ancestor , 'the first eukaryote', was a lot more sophisticated than any known bacterium.

科学家现在知道，这个共同的祖先，“第一真核生物”比任何已知的细菌都要复杂得多。

7.The longitudinal slit probably has the function of releasing endospore. From the complicated structure, it can be inferred that these organisms might be of eukaryote.

另据标本所显示的规则的开口结构，推测其可能具有释放内生孢子的功能，因此视其为可能的真核生物。

8.Humans, being complex organisms, are categorized as eukaryotes.

人类作为复杂生物，被归类为真核生物。

9.The main difference between prokaryotes and eukaryotes is the presence of a nucleus.

原核生物和真核生物之间的主要区别在于是否存在细胞核。

10.Fungi, such as mushrooms, are also considered eukaryotes.

真菌，如蘑菇，也被视为真核生物。

11.A single-celled organism like an amoeba is classified as a eukaryote.

像变形虫这样的单细胞生物被分类为真核生物。

12.Plants are a type of eukaryote that perform photosynthesis.

植物是一种进行光合作用的真核生物。

作文

The diversity of life on Earth is a fascinating subject that has intrigued scientists for centuries. One of the fundamental classifications of living organisms is based on their cellular structure, which can be broadly categorized into two groups: prokaryotes and eukaryotes. Understanding the differences between these two types of organisms is essential for grasping the complexity of life. In this essay, I will explore the characteristics of eukaryotes, their significance in the ecosystem, and their evolutionary history.Eukaryotes are defined by their complex cellular structure. Unlike prokaryotes, which are single-celled organisms without a nucleus, eukaryotes possess a true nucleus that houses their genetic material. This distinction is crucial because it allows for more sophisticated cellular processes and organization. The presence of membrane-bound organelles, such as mitochondria and the endoplasmic reticulum, further enhances the functionality of eukaryotic cells. These organelles enable eukaryotes to perform specialized functions, contributing to the overall efficiency of the organism.Another significant aspect of eukaryotes is their ability to form multicellular organisms. While some eukaryotes exist as single-celled entities, many have evolved into complex multicellular forms, including plants, animals, and fungi. This transition to multicellularity has allowed for the development of intricate biological systems and a greater range of functionalities. For example, in animals, different cell types can specialize in various tasks, such as muscle contraction or nerve signal transmission, leading to the emergence of advanced behaviors and interactions within ecosystems.In terms of ecological importance, eukaryotes play vital roles in various biomes. Plants, which are a type of eukaryote, are crucial for photosynthesis, converting sunlight into energy and producing oxygen as a byproduct. This process not only sustains plant life but also supports nearly all other life forms on Earth. Animals, another group of eukaryotes, contribute to nutrient cycling and energy flow within ecosystems. Fungi, often overlooked, play an essential role in decomposition, breaking down organic matter and recycling nutrients back into the soil.The evolutionary history of eukaryotes is equally intriguing. It is believed that they originated from a symbiotic relationship between prokaryotic organisms. The endosymbiotic theory suggests that certain organelles within eukaryotic cells, such as mitochondria and chloroplasts, were once free-living prokaryotes that were engulfed by ancestral eukaryotic cells. This remarkable event led to the emergence of a new lineage of life that would eventually give rise to the complex organisms we see today.In conclusion, eukaryotes represent a significant branch of the tree of life, characterized by their complex cellular structures and the ability to form multicellular organisms. Their ecological roles are indispensable, supporting life through processes such as photosynthesis and decomposition. Furthermore, the evolutionary journey of eukaryotes highlights the intricate relationships that have shaped the biodiversity we observe today. By studying eukaryotes, we gain valuable insights into the mechanisms of life and the interconnectedness of all living things.

地球上生命的多样性是一个迷人的主题，几个世纪以来一直吸引着科学家的关注。生物体的基本分类之一是基于它们的细胞结构，可以大致分为两组：原核生物和真核生物。理解这两类生物之间的差异对于掌握生命的复杂性至关重要。在这篇文章中，我将探讨真核生物的特征，它们在生态系统中的重要性以及它们的进化历史。真核生物的定义是其复杂的细胞结构。与没有细胞核的单细胞原核生物不同，真核生物拥有真正的细胞核，里面储存着遗传物质。这一区别至关重要，因为它使得更复杂的细胞过程和组织成为可能。膜结合的细胞器，如线粒体和内质网的存在，进一步增强了真核生物细胞的功能。这些细胞器使得真核生物能够执行专门的功能，从而有助于生物体的整体效率。真核生物的另一个重要方面是它们形成多细胞生物的能力。虽然一些真核生物作为单细胞实体存在，但许多已经进化成复杂的多细胞形式，包括植物、动物和真菌。这种向多细胞性的转变使得复杂生物系统的发展成为可能，并且具有更大的功能范围。例如，在动物中，不同类型的细胞可以专门化以执行各种任务，如肌肉收缩或神经信号传递，从而导致先进行为和生态系统内的相互作用的出现。在生态重要性方面，真核生物在各种生物群落中发挥着至关重要的作用。植物，作为一种真核生物，对光合作用至关重要，将阳光转化为能量并产生氧气作为副产品。这个过程不仅维持植物生命，还支持地球上几乎所有其他生命形式。动物，另一类真核生物，有助于营养循环和生态系统内的能量流动。真菌，常常被忽视，在分解过程中发挥着重要作用，分解有机物并将养分回收回土壤。真核生物的进化历史同样引人入胜。据信它们起源于原核生物之间的共生关系。内共生理论表明，某些真核生物细胞内的细胞器，如线粒体和叶绿体，曾经是自由生活的原核生物，后来被祖先真核生物细胞吞噬。这一非凡事件导致了一条新生命谱系的出现，最终产生了我们今天所见的复杂生物。总之，真核生物代表了生命树的重要分支，其特征是复杂的细胞结构和形成多细胞生物的能力。它们的生态角色不可或缺，通过光合作用和分解等过程支持生命。此外，真核生物的进化历程突显了塑造我们今天观察到的生物多样性的复杂关系。通过研究真核生物，我们获得了对生命机制和所有生物体相互联系的宝贵见解。