rostellum

简明释义

英[rɒˈsteləm]美[rɑːˈsteləm]

n. [无脊椎] 顶突；[动] 小喙

复 数 r o s t e l l a

英英释义

单词用法

同义词

反义词

例句

1.Rudimentary rostellum was found obviously in 3 of 10 scolices of the worms from Duyun.

染色观察都匀牛带绦虫10个头节中有3个明显可见发育不良的顶突。

2.There were 4 suckers in C. pisiformis and the scolex of T. pisiformis, and 37 hooks in the rostellum arranging with inner and outer rings.

结果表明，豆状囊尾蚴和豆状带绦虫均有4个吸盘，37个小钩分内、外两圈排列在顶突上。

3.There were 4 suckers in C. pisiformis and the scolex of T. pisiformis, and 37 hooks in the rostellum arranging with inner and outer rings.

结果表明，豆状囊尾蚴和豆状带绦虫均有4个吸盘，37个小钩分内、外两圈排列在顶突上。

4.Botanists study the rostellum to understand how plants develop their reproductive structures.

植物学家研究 rostellum 以了解植物如何发育其繁殖结构。

5.The rostellum is a key feature of many orchids, allowing them to attract specific pollinators.

对于许多兰花来说，rostellum 是一个关键特征，使它们能够吸引特定的授粉者。

6.The function of the rostellum in this plant is primarily to facilitate reproduction.

在这种植物中，rostellum 的主要功能是促进繁殖。

7.In some species, the rostellum can be quite elaborate, showcasing vibrant colors and intricate shapes.

在某些物种中，rostellum 可以非常复杂，展现出鲜艳的颜色和精致的形状。

8.The rostellum of this flower is covered in a sticky substance that helps trap pollen.

这朵花的 rostellum 上覆盖着一种粘性物质，有助于捕捉花粉。

作文

The term rostellum refers to a small, often protruding structure found in certain organisms, particularly in the context of zoology and botany. In zoology, it is commonly associated with the anatomy of some flatworms and other invertebrates, where it serves as a distinctive feature in their morphology. In botany, the rostellum can describe a part of the flower structure, specifically in orchids, where it plays a crucial role in reproduction by aiding in the pollination process. Understanding the function and significance of the rostellum in these contexts can provide deeper insights into the evolutionary adaptations of these species.In zoological terms, the rostellum can be seen as an adaptation that enhances the organism's ability to survive and reproduce. For example, in certain parasitic flatworms, the rostellum may be equipped with hooks or other structures that allow the organism to anchor itself to its host's tissues. This anchorage is vital for the parasite’s survival, as it ensures that the worm can feed off the host without being dislodged. The presence of a rostellum in these organisms highlights the intricate relationships that exist in nature, where each adaptation serves a specific purpose in the context of survival.On the other hand, in botany, the rostellum plays a significant role in the reproductive cycle of flowering plants, especially within the Orchidaceae family. Orchids are known for their complex flower structures, and the rostellum is often involved in the mechanism of pollination. It acts as a barrier that protects the reproductive organs of the flower, ensuring that only specific pollinators can access them. This selective accessibility can lead to more efficient reproduction, as it encourages cross-pollination between different orchid species, thereby increasing genetic diversity.The evolutionary significance of the rostellum cannot be understated. In both zoological and botanical contexts, this structure exemplifies how organisms adapt to their environments and ecological niches. For instance, the development of a robust rostellum in parasitic species may indicate a long evolutionary history of host-parasite interactions, while the intricate design of the rostellum in orchids reflects the co-evolution of plants and their pollinators. Such adaptations are not merely random occurrences; they are the result of millions of years of natural selection, where only those organisms that successfully utilize their rostellum thrive and reproduce.In conclusion, the rostellum is a fascinating example of how structure and function are intertwined in the natural world. Whether it is serving as a means of attachment for a parasitic organism or facilitating pollination in a flowering plant, the rostellum illustrates the complexity and diversity of life forms on our planet. By studying such features, scientists can gain valuable insights into the evolutionary processes that shape biodiversity, ultimately enhancing our understanding of life itself. As we continue to explore the intricacies of nature, the rostellum remains a small yet significant piece of the larger puzzle of evolution and adaptation.

术语rostellum指的是某些生物中发现的小而突出的结构，尤其是在动物学和植物学的背景下。在动物学中，它通常与某些扁虫和其他无脊椎动物的解剖学相关，是它们形态学中的一个独特特征。在植物学中，rostellum可以描述花结构的一部分，特别是在兰科植物中，它在繁殖中发挥着重要作用，通过帮助授粉过程来实现。理解rostellum在这些背景下的功能和重要性，可以为我们提供关于这些物种进化适应的更深入见解。在动物学术语中，rostellum可以被视为一种适应性增强了生物体生存和繁殖的能力。例如，在某些寄生扁虫中，rostellum可能配备有钩子或其他结构，使生物能够固定在宿主的组织上。这种锚定对寄生虫的生存至关重要，因为它确保了蠕虫可以从宿主身上获取食物而不被脱落。rostellum在这些生物中的存在突显了自然界中存在的错综复杂的关系，其中每种适应性都在生存的背景下发挥着特定的作用。另一方面，在植物学中，rostellum在开花植物的繁殖周期中起着重要作用，特别是在兰科植物中。兰花以其复杂的花结构而闻名，rostellum通常参与授粉机制。它充当保护花的生殖器官的屏障，确保只有特定的授粉者可以接触到它们。这种选择性的可达性可以导致更有效的繁殖，因为它鼓励不同兰花物种之间的异交，从而增加遗传多样性。rostellum的进化意义不可低估。在动物学和植物学的背景下，这一结构例证了生物体如何适应其环境和生态位。例如，寄生物种中强大的rostellum的发展可能表明宿主-寄生虫相互作用的漫长进化历史，而兰花中rostellum的复杂设计则反映了植物与其授粉者之间的共同进化。这些适应性并非偶然发生；它们是数百万年自然选择的结果，只有那些成功利用其rostellum的生物才能繁荣和繁殖。总之，rostellum是自然界中结构与功能交织的迷人例子。无论是作为寄生生物的附着手段，还是在开花植物中促进授粉，rostellum都展示了我们星球上生命形式的复杂性和多样性。通过研究这样的特征，科学家可以获得关于塑造生物多样性的进化过程的宝贵见解，最终增强我们对生命本身的理解。当我们继续探索自然的复杂性时，rostellum仍然是进化和适应的大拼图中一个小而重要的部分。