gymnosperms

简明释义

英[ˈdʒɪmnəʊspɜːmz]美[ˈdʒɪmnoʊˌspɜrmz]

n. [植]裸子植物；[植]裸子植物类（gymnosperm 的复数）

英英释义

单词用法

同义词

反义词

例句

1.He also observed that gymnosperm ovules were not enclosed in an ovary wall, leading to the establishment of one of the basic differences between angiosperms and gymnosperms.

他还观察到裸子植物的胚珠并不是被子房壁包围，这个发现直接导致了被子植物和裸子植物之间最根本的几点区别的建立。

2.On the other hand, some deciduous gymnosperms including Ginkgoales, and the presence of growth rings in the fossil secondary wood, indicate seasonal changes.

另一方面，落叶的银杏类和松柏类，以及裸子植物木化石中具有清楚的生长轮，又说明该地区的古气候存在着季节变化。

3.Based on this database, we chose the part of gymnosperms and gave a discussion to the features of its chromosomes' evolution and variation.

基于数据库的统计资料，我们选取了裸子植物类群对其染色体的变异和演化特征做了探讨。

4.Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.

大多数被子植物的胚珠有两层珠被，而裸子植物通常只有一层。

5.Palaeobotany will introduce the structure and classification of Pteridophyte, Gymnosperms and Angiosperms, and introduce the evolvement phases of the Plants.

古植物学重点介绍蕨类植物、裸子植物和被子植物各纲的结构和分类以及植物界的演化的阶段性。

6.We observed and studied the forage resources to Hainan and its neighboring islets, recorded 1064 species forage plants, of which 6 seaweeds, 11 ferns, 5 gymnosperms and 1042 angiosperms.

根据对海南岛及周边岛屿的考察，记载可不同程度供饲用的植物1064种，其中属低等植物的海藻类6种，蕨类植物11种，裸子植物5种，被子植物1042种。

7.Many species of gymnosperms 裸子植物 can be found in temperate forests.

许多种类的裸子植物可以在温带森林中找到。

8.The seeds of gymnosperms 裸子植物 are not enclosed in an ovary.

裸子植物的种子并不被包裹在子房内。

9.Pines and firs are examples of gymnosperms 裸子植物 that thrive in cold climates.

松树和冷杉是适应寒冷气候的裸子植物的例子。

10.In botany, gymnosperms 裸子植物 are classified separately from angiosperms.

在植物学中，裸子植物与被子植物被分类为不同的类别。

11.Some gymnosperms 裸子植物 produce cones instead of flowers.

一些裸子植物产生的是球果而不是花。

作文

Gymnosperms, which are a group of seed-producing plants, play a crucial role in the ecosystem and have fascinating characteristics that distinguish them from other plant groups. The term 'gymnosperm' comes from the Greek words 'gymnos', meaning naked, and 'sperma', meaning seed. This is quite fitting, as these plants produce seeds that are not enclosed in an ovary, unlike their counterparts, the angiosperms, or flowering plants. The seeds of gymnosperms (裸子植物) are often exposed on cones or other structures, making them unique in the plant kingdom. One of the most well-known examples of gymnosperms (裸子植物) is the coniferous tree, such as pine, spruce, and fir. These trees are adapted to a variety of environments and are especially prominent in colder climates. Their needle-like leaves reduce water loss, making them well-suited for survival in harsh conditions. Additionally, the thick bark of many gymnosperms (裸子植物) protects them from extreme temperatures and pests. The reproductive process of gymnosperms (裸子植物) is also quite interesting. They reproduce through cones, which are the reproductive structures of these plants. Male cones produce pollen, while female cones contain ovules that develop into seeds after fertilization. This method of reproduction allows gymnosperms (裸子植物) to disperse their seeds over large distances, increasing their chances of survival and colonization in new areas. In addition to their ecological importance, gymnosperms (裸子植物) have significant economic value. Many species are harvested for timber, paper production, and resin. For instance, the wood from pine trees is widely used in construction and furniture making due to its strength and durability. Furthermore, products derived from gymnosperms (裸子植物), such as turpentine and rosin, are essential in various industries, including pharmaceuticals and cosmetics. Despite their importance, gymnosperms (裸子植物) face several threats due to climate change, habitat destruction, and invasive species. As global temperatures rise and ecosystems shift, many gymnosperms (裸子植物) may struggle to adapt to new conditions. Conservation efforts are essential to protect these ancient plants and their habitats. Understanding the biology and ecology of gymnosperms (裸子植物) can help us develop strategies to preserve their populations and the ecosystems they support. In conclusion, gymnosperms (裸子植物) are a remarkable group of plants that contribute significantly to our planet's biodiversity and economy. Their unique characteristics, reproductive strategies, and adaptability make them an essential subject of study in botany and ecology. By learning more about gymnosperms (裸子植物), we can appreciate their role in nature and work towards ensuring their survival for future generations.

裸子植物是一类种子植物，在生态系统中发挥着至关重要的作用，并具有迷人的特征，使其与其他植物群体区别开来。‘gymnosperm’这个词源于希腊语，‘gymnos’意为裸露，‘sperma’意为种子。这非常贴切，因为这些植物产生的种子并不被子房包裹，与它们的对立面——被子植物或开花植物不同。gymnosperms（裸子植物）的种子通常暴露在锥体或其他结构上，这使得它们在植物王国中独具特色。 最著名的gymnosperms（裸子植物）例子之一是针叶树，如松树、云杉和冷杉。这些树木适应了多种环境，尤其在寒冷气候中占据重要地位。它们针状的叶子减少了水分流失，使其能够在恶劣条件下生存。此外，许多gymnosperms（裸子植物）的厚树皮保护它们免受极端温度和害虫的侵害。 gymnosperms（裸子植物）的繁殖过程也非常有趣。它们通过锥体繁殖，锥体是这些植物的生殖结构。雄性锥体产生花粉，而雌性锥体则含有卵子，在受精后发育成种子。这种繁殖方式使得gymnosperms（裸子植物）能够将其种子传播到广泛的距离，从而增加它们在新区域生存和定殖的机会。 除了生态重要性外，gymnosperms（裸子植物）还具有显著的经济价值。许多物种被用于木材、纸张生产和树脂的采伐。例如，松树的木材因其强度和耐用性而广泛用于建筑和家具制造。此外，从gymnosperms（裸子植物）衍生的产品，如松香和树脂，在制药和化妆品等各个行业中都是必不可少的。 尽管它们的重要性，gymnosperms（裸子植物）正面临着气候变化、栖息地破坏和入侵物种等多重威胁。随着全球气温上升和生态系统变化，许多gymnosperms（裸子植物）可能会难以适应新的条件。保护工作对于保护这些古老植物及其栖息地至关重要。了解gymnosperms（裸子植物）的生物学和生态学可以帮助我们制定策略，以保护其种群和支持它们的生态系统。 总之，gymnosperms（裸子植物）是一类引人注目的植物，对我们星球的生物多样性和经济做出了显著贡献。它们独特的特征、繁殖策略和适应能力使其成为植物学和生态学的重要研究对象。通过更多地了解gymnosperms（裸子植物），我们可以欣赏它们在自然界中的作用，并努力确保它们的生存，以造福未来的世代。