craniate

简明释义

英[ˈkreɪnieɪt]美[ˈkreɪniˌeɪt]

adj. 有头盖的；有头动物的；脊椎动物的

n. 有头动物；脊椎动物

英英释义

单词用法

同义词

反义词

例句

1.The study of vertebrates focuses on the evolution of the craniate 头骨动物 lineage.

对脊椎动物的研究集中在头骨动物谱系的进化上。

2.Fish are among the earliest known craniate 头骨动物 that appeared in the fossil record.

鱼类是已知最早出现于化石记录中的头骨动物之一。

3.All mammals are classified as craniate 头骨动物, sharing a common ancestor.

所有哺乳动物都被归类为头骨动物，它们共享一个共同的祖先。

4.The presence of a skull is a defining characteristic of craniate 头骨动物.

颅骨的存在是头骨动物的一个定义特征。

5.Invertebrates differ significantly from craniate 头骨动物 in their anatomical structure.

无脊椎动物在解剖结构上与头骨动物有显著差异。

作文

The term craniate refers to a broad group of animals that possess a skull, which is a significant evolutionary development in the animal kingdom. This classification primarily includes vertebrates such as mammals, birds, reptiles, amphibians, and fish. The presence of a skull not only protects the brain but also provides structure for the face and supports the sensory organs. Understanding the characteristics and evolution of craniates can give us insight into the complexity of life forms and their adaptations over millions of years. From an evolutionary perspective, craniates are believed to have emerged around 500 million years ago during the Cambrian period. Fossil evidence suggests that early craniates were simple organisms, but they gradually evolved into more complex forms. The development of a skull allowed for a more sophisticated nervous system and improved sensory capabilities, which were crucial for survival in diverse environments. This adaptation enabled craniates to become dominant in various ecosystems, showcasing their versatility and resilience. One fascinating aspect of craniates is their diverse range of species, each exhibiting unique traits and behaviors. For instance, mammals, a subgroup of craniates, are characterized by their warm-blooded nature, fur or hair, and the ability to nurse their young with milk. Birds, another subgroup, have feathers and are known for their ability to fly, which has allowed them to occupy niches that many other animals cannot reach. Reptiles, on the other hand, have adapted to life on land with their scaly skin and ability to lay eggs in terrestrial environments. Each of these groups illustrates the adaptability and evolutionary success of craniates. In addition to their physical adaptations, craniates also exhibit complex behaviors and social structures. Many species engage in intricate mating rituals, territorial disputes, and cooperative hunting strategies. For example, wolves, which are craniates, live in packs and demonstrate strong social bonds, working together to hunt and raise their young. This social structure not only enhances their survival but also fosters communication and learning within the group. Moreover, the study of craniates has significant implications for understanding human biology and medicine. Research on various craniate species has provided insights into genetic diseases, developmental biology, and evolutionary processes. For instance, studying the regenerative abilities of certain fish and amphibians can lead to breakthroughs in tissue regeneration and healing in humans. The comparative anatomy of craniates also helps scientists understand the evolutionary relationships between different species, shedding light on how traits have been conserved or modified over time. In conclusion, the term craniate encompasses a vast array of species that have evolved remarkable adaptations to thrive in diverse environments. From their protective skulls to their complex behaviors, craniates exemplify the intricate tapestry of life on Earth. As we continue to explore and study these fascinating organisms, we gain not only a deeper appreciation for their diversity but also valuable knowledge that can benefit humanity in various fields. The evolution and adaptation of craniates serve as a testament to the power of natural selection and the ongoing journey of life on our planet.

术语craniate指的是一种广泛的动物群体，它们具有头骨，这是动物王国中一个重要的进化发展。这个分类主要包括脊椎动物，如哺乳动物、鸟类、爬行动物、两栖动物和鱼类。头骨的存在不仅保护大脑，还为面部提供结构，并支持感官器官。理解craniates的特征和进化可以让我们深入了解生命形式的复杂性及其在数百万年中的适应性。 从进化的角度来看，craniates被认为是在大约5亿年前的寒武纪时期出现的。化石证据表明，早期的craniates是简单的生物，但它们逐渐演变为更复杂的形式。头骨的发展使得更复杂的神经系统和改善的感官能力成为可能，这对于在多样化环境中的生存至关重要。这种适应能力使得craniates能够在各种生态系统中占据主导地位，展示了它们的多样性和韧性。 craniates的一个迷人方面是它们种类的多样性，每种都表现出独特的特征和行为。例如，哺乳动物是craniates的一个亚组，其特点是温血、毛发或皮毛，并能用乳汁哺育幼崽。鸟类是另一个亚组，具有羽毛，以其飞行能力而闻名，这使它们能够占据许多其他动物无法到达的生态位。另一方面，爬行动物通过鳞片和在陆地环境中产卵的能力适应了陆地生活。这些群体中的每一个都展示了craniates的适应性和进化成功。 除了身体适应性外，craniates还表现出复杂的行为和社会结构。许多物种参与复杂的交配仪式、领土争夺和合作狩猎策略。例如，狼作为craniates，生活在群体中，展现出强烈的社会纽带，协同工作以捕猎和抚养幼崽。这种社会结构不仅增强了它们的生存能力，还促进了群体内的交流和学习。 此外，研究craniates对理解人类生物学和医学具有重要意义。对各种craniate物种的研究提供了关于遗传疾病、发育生物学和进化过程的见解。例如，研究某些鱼类和两栖动物的再生能力可以导致人类组织再生和愈合方面的突破。craniates的比较解剖学也帮助科学家理解不同物种之间的进化关系，揭示了特征如何随着时间的推移而被保留或修改。 总之，术语craniate涵盖了一系列广泛的物种，这些物种已经进化出显著的适应能力，以在多样化环境中生存。从它们的保护性头骨到复杂的行为，craniates体现了地球上生命的复杂织锦。随着我们继续探索和研究这些迷人的生物，我们不仅获得了对它们多样性的更深刻欣赏，还获得了在各个领域可以惠及人类的宝贵知识。craniates的进化和适应能力证明了自然选择的力量以及我们星球上生命的持续旅程。