lancelet

简明释义

英[ˈlɑːnslɪt]美[ˈlænslɪt]

n. [无脊椎] 文昌鱼

英英释义

单词用法

同义词

反义词

例句

1.In Zhengzhou, where can purchase the Xiamen special local product: Lancelet?

在郑州哪里能买到厦门特产：文昌鱼?。

2.Photo: a lancelet, a close relative of vertebrates, in several stages of decay. credit: University of Leicester.

图片：脊椎动物的近亲，一只文昌鱼腐烂过程的几个阶段。

3.Photo: a lancelet, a close relative of vertebrates, in several stages of decay. credit: University of Leicester.

图片：脊椎动物的近亲，一只文昌鱼腐烂过程的几个阶段。

4.In the marine biology class, we observed a lancelet （文昌鱼） under a microscope to understand its anatomy.

在海洋生物学课上，我们在显微镜下观察了一只lancelet （文昌鱼） 以了解它的解剖结构。

5.The lancelet （文昌鱼） has a simple body structure that resembles the early ancestors of fish.

这只lancelet （文昌鱼） 的身体结构简单，类似于鱼类的早期祖先。

6.Researchers found that the lancelet （文昌鱼） shares many genetic similarities with higher vertebrates.

研究人员发现，lancelet （文昌鱼） 与更高等的脊椎动物有许多遗传相似性。

7.The habitat of the lancelet （文昌鱼） includes sandy bottoms in shallow coastal waters.

lancelet （文昌鱼） 的栖息地包括浅海沿岸的沙底。

8.The biologist explained that the lancelet （文昌鱼） is a key organism for studying the evolution of vertebrates.

生物学家解释说，lancelet （文昌鱼） 是研究脊椎动物进化的关键生物。

作文

The study of marine biology reveals a fascinating array of organisms that inhabit our oceans, one of which is the Lancelet. The Lancelet is a small, fish-like creature that belongs to the phylum Chordata and is often considered a key organism for understanding the evolution of vertebrates. These organisms are characterized by their elongated bodies and a notochord, which is a flexible rod that provides support. This feature is particularly significant as it represents a crucial evolutionary step in the development of more complex vertebrate structures.In terms of habitat, Lancelets are typically found buried in sandy or muddy substrates in shallow coastal waters. They filter-feed by drawing water through their bodies and trapping microscopic food particles with specialized structures called gill slits. This feeding mechanism highlights their role in the marine ecosystem as both prey and a means of nutrient cycling.One of the most intriguing aspects of Lancelets is their anatomical structure. Unlike many other marine organisms, they possess a simple body plan that has remained relatively unchanged for millions of years. This makes them an excellent subject for evolutionary studies. Researchers often use Lancelets to explore questions about the origins of vertebrates, as they share several characteristics with early vertebrate ancestors.Moreover, the genetic makeup of Lancelets has been a focal point in developmental biology. Scientists have discovered that certain genes responsible for the formation of the nervous system in Lancelets are similar to those found in vertebrates. This genetic similarity suggests that Lancelets may provide insights into how complex structures evolved over time, shedding light on the transition from simple chordates to more complex forms of life.In addition to their biological significance, Lancelets also play a role in education and research. They are often used in laboratory settings to teach students about basic biological principles, including anatomy, physiology, and evolutionary theory. Their simple structure allows students to easily observe and understand fundamental concepts without the complications presented by more complex organisms.Despite their importance, Lancelets face threats from environmental changes, such as habitat destruction and pollution. As coastal ecosystems are altered due to human activities, the delicate balance that supports Lancelet populations can be disrupted. Conservation efforts are essential to ensure that these remarkable organisms continue to thrive in their natural habitats.In conclusion, the Lancelet is much more than just a simple marine creature; it is a vital link in the evolutionary chain that connects invertebrates to vertebrates. Its unique characteristics and ecological role make it an important subject of study in marine biology and evolutionary science. As we continue to explore the mysteries of the ocean, understanding organisms like the Lancelet will be crucial for unraveling the complexities of life on Earth. Protecting their habitats and ensuring their survival is not only important for biodiversity but also for our understanding of our own evolutionary history.

海洋生物学的研究揭示了栖息在我们海洋中的迷人有机体，其中之一就是Lancelet。Lancelet是一种小型鱼状生物，属于脊索动物门，通常被认为是理解脊椎动物进化的关键生物。这些生物的特征是它们细长的身体和脊索，这是一种提供支撑的柔性杆。这一特征特别重要，因为它代表了更复杂的脊椎结构发展的关键进化步骤。在栖息地方面，Lancelet通常生活在浅海沿岸的沙质或泥质底部。它们通过将水吸入体内并用称为腮裂的特殊结构捕获微小的食物颗粒来进行滤食。这种喂养机制突显了它们在海洋生态系统中的角色，既是猎物也是营养循环的媒介。Lancelet最引人入胜的方面之一是它们的解剖结构。与许多其他海洋生物不同，它们具有一种简单的身体结构，这种结构在数百万年间保持相对不变。这使得它们成为进化研究的优秀对象。研究人员经常使用Lancelet来探讨关于脊椎动物起源的问题，因为它们与早期脊椎动物祖先共享多个特征。此外，Lancelet的遗传构成一直是发育生物学的一个焦点。科学家发现，负责形成Lancelet神经系统的某些基因与脊椎动物中发现的基因相似。这种遗传相似性表明，Lancelet可能为我们提供关于复杂结构如何随着时间演变的见解，揭示了从简单脊索动物到更复杂生命形式的转变。除了它们的生物学意义外，Lancelet在教育和研究中也发挥着作用。它们通常在实验室环境中用于教授学生基本的生物原理，包括解剖学、生理学和进化理论。它们简单的结构使学生能够轻松观察和理解基本概念，而不会被更复杂的生物所困扰。尽管它们的重要性，Lancelet面临着来自环境变化的威胁，如栖息地破坏和污染。随着人类活动改变沿海生态系统，支持Lancelet种群的微妙平衡可能会被打破。保护工作对于确保这些非凡生物在其自然栖息地中继续繁荣至关重要。总之，Lancelet不仅仅是一种简单的海洋生物；它是连接无脊椎动物和脊椎动物进化链中的重要环节。它独特的特征和生态角色使其成为海洋生物学和进化科学的重要研究对象。随着我们继续探索海洋的奥秘，理解像Lancelet这样的生物将对揭开地球上生命的复杂性至关重要。保护它们的栖息地并确保它们的生存不仅对生物多样性重要，也对我们理解自身的进化历史至关重要。