tropism

简明释义

英[ˈtrəʊpɪzəm;ˈtrɒpɪzəm]美[ˈtroʊpɪzəm]

n. 取向；向性；[生物] 趋性；向性运动

英英释义

单词用法

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例句

1.Objective To investigate the effect of soluvit for white blood cells tropism and phagocytic power in severe burned patients.

目的探讨水乐维他对严重烧伤病人白细胞趋向性及吞噬功能的影响。

2.Tropism of taste: bitter, cold. In the heart, stomach.

性味归经：苦，寒。归心、胃经。

3.The value tropism of public policy is the basic theory question of public policy analysis.

公共政策的价值取向问题是公共政策分析的基础理论问题。

4.Hydrotropism (hydrotropic movement) a tropism in which the stimulus is water. It is a special kind of chemotropism.

向水性(向水运动)：是由于水分刺激而产生的向性运动，属于向化性的一种特殊类型。

5.Creditor's rights preservation is the fundamental value tropism of the creditor's subrogation system.

保全债权是债权人代位权制度的基本价值取向。

6.Its working principle, the signal tropism and the setting of indexing plate are introduced here with the calculating method of its speed ratio.

本文介绍车速里程表的工作原理、信号取向和标度盘的设定，给出了车速里程表速比的计算方法。

7.However, little is known about the mechanisms underlying the glioma-induced tropism of stem cells.

然而，对干细胞向胶质瘤迁移的机制仍知之甚少。

8.V. The value tropism of personal extra-curricular reading.

论述了个性化课外阅读的价值取向。

9.The character of cell receptors is one of the key factors contribute to virus tropism.

细胞受体是决定口蹄疫病毒宿主特异性和组织特异性的主要因素之一。

10.The tropism of roots growing downwards is known as gravitropism.

根部向下生长的趋性被称为重力趋性。

11.The concept of tropism can also apply to animal behavior, such as birds migrating towards warmer climates.

在动物行为中，趋性的概念也适用，例如鸟类迁徙到更温暖的气候。

12.Plants exhibit positive tropism when they grow towards light.

植物表现出正向趋性，当它们朝向光源生长时。

13.In response to moisture, some plants show hydrotropic tropism by directing their roots toward water sources.

一些植物对水分的反应，通过将根部指向水源来展示水向性趋性。

14.Certain flowers demonstrate phototropic tropism by turning their heads to follow the sun.

某些花通过转动头部跟随太阳展示光向性趋性。

作文

Tropism is a fascinating biological phenomenon that refers to the growth or movement of an organism in response to an environmental stimulus. This term is derived from the Greek word 'tropos', meaning 'turn' or 'change'. In essence, tropism (趋性) describes how plants and some animals react to various stimuli such as light, gravity, and water. Understanding tropism (趋性) is crucial for comprehending how organisms adapt to their environments, ensuring their survival and reproduction.One of the most well-known types of tropism (趋性) is phototropism, which is the growth of plants towards light. This behavior is vital for plants as it allows them to maximize their exposure to sunlight, which is essential for photosynthesis. When a plant perceives light coming from one direction, it will grow more rapidly on the side that is away from the light source, causing the plant to bend towards the light. This remarkable ability not only helps the plant thrive but also illustrates the intricate relationship between living organisms and their environment.Another significant type of tropism (趋性) is gravitropism, which is the growth response of plants to gravity. Roots typically exhibit positive gravitropism, growing downwards into the soil, while stems show negative gravitropism, growing upwards towards the sky. This dual response ensures that plants can anchor themselves securely in the ground while reaching for sunlight. The study of tropism (趋性) has implications not only in botany but also in agriculture, as understanding these growth patterns can lead to better crop yields and sustainable farming practices.Hydrotropism is another fascinating aspect of tropism (趋性). It refers to the growth of plant roots towards moisture. In arid environments where water is scarce, roots will grow in the direction of available moisture, allowing the plant to access vital resources. This adaptability showcases the resilience of plants and their ability to survive in challenging conditions.The concept of tropism (趋性) is not limited to plants; certain animals also exhibit tropic behaviors. For example, many insects are attracted to light sources at night due to their natural navigation systems. This behavior, known as positive phototropism, can often lead to fatal consequences, as insects may become trapped in artificial lights. Understanding these responses can help us mitigate human impact on wildlife and create more sustainable environments.In conclusion, tropism (趋性) is a vital concept in biology that encompasses the various ways in which organisms respond to their environment. From the graceful bending of a sunflower towards the sun to the determined growth of roots in search of water, tropism (趋性) illustrates the dynamic relationship between living beings and their surroundings. As we continue to study these phenomena, we gain deeper insights into the complexities of life on Earth and the delicate balance that sustains it.