dimorphism

简明释义

英[daɪˈmɔːfɪzəm]美[daɪˈmɔrˌfɪzəm]

n. [动][植] 二态性；同种二形

英英释义

单词用法

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例句

1.This indicated that the pollen dimorphism also presented itself in the anthers on wheat plants.

这表明在小麦的活体花药中也存在花粉二型性现象。

2.This indicated that the pollen dimorphism also presented itself in the anthers on wheat plants.

这表明在小麦的活体花药中也存在花粉二型性现象。

3.Dimorphism The existence of two distinct forms.

出现两种不同的类型。

4.In many species of butterflies, sexual dimorphism 两态性 is evident, with males and females displaying different wing colors.

在许多蝴蝶物种中，性别dimorphism 两态性 明显，雄性和雌性显示出不同的翅膀颜色。

5.The study of dimorphism 两态性 in plants can help us understand how environmental factors influence growth.

对植物中dimorphism 两态性 的研究可以帮助我们理解环境因素如何影响生长。

6.Birds often exhibit dimorphism 两态性, where males are more brightly colored than females to attract mates.

鸟类常常表现出dimorphism 两态性，雄性比雌性颜色更鲜艳以吸引配偶。

7.In some fish species, dimorphism 两态性 can be seen in their body size and coloration during breeding seasons.

在某些鱼类物种中，繁殖季节时可以看到它们的体型和颜色的dimorphism 两态性。

8.The phenomenon of dimorphism 两态性 is crucial for understanding evolutionary adaptations in various species.

了解各种物种中的dimorphism 两态性 现象对于理解进化适应至关重要。

作文

In the world of biology, the concept of dimorphism (二态性) plays a crucial role in understanding the diversity of life forms. Dimorphism refers to the occurrence of two distinct forms or morphs within a species, often related to sexual differences or variations in environmental adaptation. This phenomenon can be observed in various organisms, from plants to animals, and serves as a fascinating example of evolutionary strategies at play. One of the most well-known examples of dimorphism is found in the animal kingdom, particularly among birds. Male and female birds often exhibit strikingly different plumage colors and patterns. For instance, the male peacock is renowned for its vibrant and colorful tail feathers, which it displays during courtship rituals to attract females. In contrast, the female peahen has more subdued coloration, which helps her blend into her surroundings and avoid predators. This sexual dimorphism not only highlights the importance of visual signals in mating but also demonstrates how natural selection shapes physical traits based on survival needs. Similarly, dimorphism can be observed in other species, such as insects. Take the case of certain butterfly species, where males and females exhibit different wing patterns and colors. These differences can serve various purposes, including attracting mates or providing camouflage from predators. The presence of dimorphism in these species underscores the complexity and adaptability of life, showcasing how organisms evolve distinct characteristics to thrive in their environments. In addition to sexual dimorphism, there is also environmental dimorphism, which occurs when individuals of the same species develop different forms in response to varying environmental conditions. For example, the water hyacinth plant can exhibit two forms: one that floats on the water's surface and another that grows submerged. This adaptability allows the plant to maximize its chances of survival in fluctuating aquatic environments. Such instances of environmental dimorphism highlight the dynamic relationship between organisms and their habitats, emphasizing the importance of flexibility in the face of change. Furthermore, dimorphism is not limited to the animal and plant kingdoms; it can also be observed in fungi and bacteria. Certain fungal species display dimorphism by existing in both yeast and mold forms, depending on environmental conditions. This ability to switch forms enhances their survival and adaptability, demonstrating that dimorphism is a widespread phenomenon across various life forms. Understanding dimorphism is essential for biologists and ecologists as it provides insights into the complexities of evolution, adaptation, and survival strategies in nature. By studying the various forms that organisms can take, scientists can better comprehend the intricate web of life and the factors that drive diversity. Furthermore, recognizing the role of dimorphism in ecosystems can inform conservation efforts aimed at preserving biodiversity and promoting resilience in the face of environmental changes. In conclusion, dimorphism (二态性) is a remarkable aspect of biological diversity that illustrates the myriad ways in which life adapts and evolves. Whether through sexual or environmental variations, dimorphism offers a window into the complexities of nature, revealing the strategies that organisms employ to survive and thrive. As we continue to explore the wonders of the natural world, the concept of dimorphism will undoubtedly remain a key focus for researchers seeking to unravel the mysteries of life itself.