chordate

简明释义

英[/ˈkɔːr.deɪt/]美[/ˈkɔːr.deɪt/]

n. 脊索动物

adj. 脊索动物的

英英释义

单词用法

同义词

反义词

例句

1.The origin of vertebrates has always been a core question in evolutionary biology. It is well accepted that vertebrates and invertebrate chordate derived from a common ancestor.

脊椎动物的起源是进化生物学研究的核心问题之一，目前人们普遍认为脊椎动物与无脊椎动物中的脊索动物起源于同一个原始祖先。

2.Beginning. This genus is considered a chordate, and the phylum Chordata includes fish, mammals and man.

的注意。因为这一类动物属于最高的脊索或半脊索动物，包括鱼类，哺乳类动物和人。

3.The middle zone of the mesoderm of a chordate vertebrate embryo, from which excretory tissue develops.

中胚叶节脊索类脊椎动物胚胎的中胚层的中间部分，…

4.The origin of vertebrates has always been a core question in evolutionary biology. It is well accepted that vertebrates and invertebrate chordate derived from a common ancestor.

脊椎动物的起源是进化生物学研究的核心问题之一，目前人们普遍认为脊椎动物与无脊椎动物中的脊索动物起源于同一个原始祖先。

5.All chordates 脊索动物 share certain characteristics, such as a dorsal nerve cord.

所有脊索动物都具有一些共同特征，例如背侧神经索。

6.Scientists study the evolution of chordates 脊索动物 to understand how complex life forms developed.

科学家研究脊索动物的进化，以了解复杂生命形式是如何发展的。

7.The chordate 脊索动物 phylum includes animals like mammals, birds, and fish.

脊索动物门包括哺乳动物、鸟类和鱼类等动物。

8.Every chordate 脊索动物 has a notochord at some stage of its development.

每个脊索动物在其发育的某个阶段都有脊索。

9.Fish are the most diverse group of chordates 脊索动物 found in aquatic environments.

鱼类是水生环境中最具多样性的脊索动物群体。

作文

The term chordate refers to a diverse group of animals that share certain key characteristics. These include having a notochord, a dorsal nerve cord, pharyngeal slits, and a post-anal tail at some stage of their development. The chordates are a significant subphylum within the animal kingdom, encompassing a variety of species ranging from the familiar mammals, birds, and reptiles to less well-known organisms like tunicates and lancelets. Understanding the evolutionary significance of chordates helps us appreciate the complexity of life on Earth.One of the most fascinating aspects of chordates is their evolutionary history. They are believed to have evolved over 500 million years ago during the Cambrian period. Fossils of early chordates provide insight into how these animals adapted to their environments. For instance, the transition from aquatic to terrestrial life is a critical moment in the evolution of chordates, leading to the emergence of amphibians, reptiles, and eventually mammals.In addition to their evolutionary importance, chordates display remarkable diversity in form and function. Fish, for example, represent the largest group of chordates and have adapted to a wide range of aquatic environments. Their gills allow them to extract oxygen from water, while their streamlined bodies enable efficient movement through their habitats. On the other hand, birds have evolved unique adaptations for flight, such as lightweight bones and feathers, showcasing the incredible versatility of chordates in exploiting different ecological niches.Mammals, another major group of chordates, exhibit a range of reproductive strategies and social behaviors. From the nurturing care of a mother for her young to the complex social structures seen in species like elephants and dolphins, mammals highlight the intricate relationships that can develop within the chordate lineage. Furthermore, humans, as part of the mammalian family, have significantly impacted the planet, both positively and negatively, demonstrating the profound influence that chordates can have on ecosystems.The study of chordates is not only important for understanding biodiversity but also for conservation efforts. Many chordate species are currently facing threats from habitat loss, climate change, and pollution. By studying their biology and ecology, scientists can develop strategies to protect these vital species and their habitats. Conservation initiatives often focus on preserving biodiversity, which is crucial for maintaining healthy ecosystems and ensuring the survival of chordates and other life forms.In conclusion, chordates play a vital role in our understanding of the animal kingdom. Their evolutionary history, diversity, and ecological significance make them a fascinating subject of study. As we continue to explore the complexities of life, it is essential to recognize the importance of chordates and work towards their preservation for future generations. The interconnectedness of all living organisms highlights the need for a holistic approach to environmental conservation, ensuring that chordates and their habitats are protected for years to come.

术语脊索动物指的是一类具有某些关键特征的多样化动物。这些特征包括在其发育的某个阶段具有脊索、背神经索、咽裂和肛后尾。脊索动物是动物王国中的一个重要亚门，涵盖了从熟悉的哺乳动物、鸟类和爬行动物到一些不太为人知的生物，如海鞘和文昌鱼等多种物种。理解脊索动物的进化意义有助于我们欣赏地球生命的复杂性。脊索动物最引人入胜的方面之一是它们的进化历史。它们被认为是在5亿年前的寒武纪时期演化而来的。早期脊索动物的化石提供了这些动物如何适应其环境的见解。例如，从水生到陆生生活的过渡是脊索动物进化中的一个关键时刻，导致了两栖动物、爬行动物以及最终的哺乳动物的出现。除了它们的进化重要性外，脊索动物在形态和功能上表现出显著的多样性。例如，鱼类代表了最大的脊索动物群体，并已适应各种水生环境。它们的鳃使它们能够从水中提取氧气，而流线型的身体则使它们能够高效地在栖息地中移动。另一方面，鸟类则发展出独特的飞行适应性，如轻质骨骼和羽毛，展示了脊索动物在利用不同生态位方面的惊人多样性。哺乳动物，作为脊索动物的另一个主要群体，展现出多种繁殖策略和社会行为。从母亲对幼崽的关爱到大象和海豚等物种所见的复杂社会结构，哺乳动物突显了在脊索动物谱系中可能发展出的复杂关系。此外，作为哺乳动物家族的一部分，人类对地球产生了重大影响，无论是积极还是消极，展示了脊索动物对生态系统的深远影响。对脊索动物的研究不仅对理解生物多样性至关重要，而且对保护工作也至关重要。许多脊索动物物种目前面临栖息地丧失、气候变化和污染等威胁。通过研究它们的生物学和生态学，科学家可以制定保护这些重要物种及其栖息地的策略。保护倡议通常专注于保护生物多样性，这对于维持健康的生态系统和确保脊索动物及其他生命形式的生存至关重要。总之，脊索动物在我们理解动物王国中扮演着重要角色。它们的进化历史、多样性和生态重要性使它们成为一个迷人的研究对象。随着我们继续探索生命的复杂性，认识到脊索动物的重要性并为未来几代人的保护而努力至关重要。所有生物之间的相互关联凸显了采取整体方法进行环境保护的必要性，确保脊索动物及其栖息地在未来得以保护。