flagellum
简明释义
n. [昆] 鞭毛；鞭子；鞭状匍匐枝
复 数 f l a g e l l a 或 f l a g e l l u m s
英英释义
单词用法
精子的鞭毛 | |
原生动物中的鞭毛 | |
鞭状鞭毛 | |
鞭毛驱动的运动性 |
同义词
反义词
| 纤毛 | Cilia are shorter than flagella and often occur in large numbers on a single cell. | 纤毛比鞭毛短，通常在单个细胞上以大量存在。 | |
| 非运动性 | Non-motile cells do not have flagella or cilia for movement. | 非运动性细胞没有鞭毛或纤毛用于运动。 |
例句
1.Thefinal evolution of the flagellum might then have involved only thenovel recombination of sophisticated parts that initially evolved forother purposes.
鞭毛的最终出现，可能仅仅来自本来向其它方向进化的复杂器官的重新组合。
2.A flagellum is a long, slender projection from the cell body, whose function is to propel an organism.
鞭毛是细胞体上的细长突出，它的作用是推动微生物移动。
3.The strain was gram negative, ellipse cell, no spores and no flagellum.
菌株细胞呈椭球形，革兰氏阴性，不产芽孢，无鞭毛。
4.They have a whiplike structure called a flagellum.
它们有像鞭子一样鞭毛结构。
5.Thefinal evolution of the flagellum might then have involved only thenovel recombination of sophisticated parts that initially evolved forother purposes.
鞭毛的最终出现，可能仅仅来自本来向其它方向进化的复杂器官的重新组合。
6.We found that a fermentative bacterium used its flagellum for interaction with a specific methanogenic archaeon.
研究人员发现，发酵性细菌能利用其鞭毛与特定的古甲烷菌产生互作。
7.The structure of the flagellum is essential for the swimming ability of sperm cells.
精子细胞的游泳能力依赖于鞭毛的结构。
8.Certain algae have multiple flagella that help them to navigate through water.
某些藻类有多个鞭毛，帮助它们在水中导航。
9.The bacterium moves by using a single flagellum, which acts like a tail.
这种细菌通过使用一个单一的鞭毛来移动，像尾巴一样。
10.The flagellum is composed of microtubules arranged in a specific pattern.
鞭毛由以特定模式排列的微管组成。
11.In some protozoa, the flagellum is used for locomotion in aquatic environments.
在一些原生动物中，鞭毛用于在水生环境中的运动。
作文
In the microscopic world, organisms exhibit a remarkable diversity in their structure and function. One of the fascinating features found in many single-celled organisms is the presence of a structure known as a flagellum. A flagellum (鞭毛) is a long, whip-like appendage that protrudes from the cell body and is primarily used for movement. This unique adaptation allows microorganisms to swim through liquid environments, demonstrating the incredible evolutionary strategies that have developed over millions of years.The flagellum plays a crucial role in the motility of various organisms, including bacteria, protozoa, and some algae. In bacteria, the flagellum is composed of a protein called flagellin and is anchored to the cell membrane by a complex structure known as the basal body. The rotation of the flagellum enables bacteria to propel themselves forward or change direction, allowing them to navigate towards nutrients or away from harmful substances.In eukaryotic cells, such as those of protozoa and certain algae, the structure of the flagellum is more complex. Eukaryotic flagella are made up of microtubules arranged in a characteristic '9+2' pattern, surrounded by a plasma membrane. This arrangement allows for a beating motion, which is different from the rotary motion seen in prokaryotic flagella. For example, the protist *Euglena* uses its flagellum not only for locomotion but also to help capture light for photosynthesis, showcasing the multifunctionality of this organelle.The study of flagella has significant implications in various scientific fields, including microbiology, genetics, and medicine. Understanding how these structures work can provide insights into bacterial behavior, which is essential for developing new antibiotics and treatments for infections. Moreover, the mechanisms of movement facilitated by the flagellum can also inform research in bioengineering and robotics, where scientists aim to create synthetic swimmers inspired by nature.However, not all organisms utilize flagella for movement. Some rely on other structures, such as cilia or pseudopodia. Cilia are similar to flagella but are shorter and more numerous, covering the surface of the cell like tiny hairs. Pseudopodia, on the other hand, involve the extension of the cell membrane and cytoplasm, allowing for a crawling motion. Each of these adaptations highlights the diverse strategies life forms have evolved to thrive in their environments.In conclusion, the flagellum (鞭毛) is an essential organelle that illustrates the complexity and adaptability of life at the microscopic level. Its role in motility not only aids in the survival of many organisms but also serves as a fascinating subject of study across multiple scientific disciplines. As we continue to explore the intricacies of life, the flagellum remains a symbol of the ingenuity of nature's designs, reminding us of the interconnectedness of all living beings and their evolutionary paths.
