gymnosperms
美 [d??m'n?sp?mz] 
英 [d??m'n?sp?mz]
- n.【植】裸子植物
- 網絡裸子植物類；裸子植物門；種子植物只分爲裸子植物
詞形變化
復數：gymnosperms 反義詞
英漢解釋
英英解釋
例句
Its native gymnosperms could evolve into a few species capable of growing in the warm, moist forests of Queensland.
本地的裸子植物可進化成能在昆士蘭溫暖濕潤林區的樹種。
It has enabled gymnosperms and angiosperms to colonize dry terrestrial habitats where lower plants are unable to establish themselves.
它使裸子植物和被子植物得以在干旱的陸地上繁衍生息，而低等植物是無法做到的。
Only dicotyledonous flowering woody plants and most gymnosperms have true twigs; monocotyledons and tree ferns do not.
只有雙子葉的木本開花植物和大部分的裸子植物才有真正的小枝，而單子葉植物和樹蕨類植物則沒有。
primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms.
躍于中生代，現在退化為一些分散的熱帶形式。
Based on this database, we chose the part of gymnosperms and gave a discussion to the features of its chromosomes' evolution and variation.
基于數據庫的統計資料，我們選取了裸子植物類群對其染色體的變異和演化特征做了探討。
In gymnosperms , the egg into the neck with only one of the two sperm and egg fusion.
在裸子植物中，進入頸卵器的兩個精子只有一個與卵融合。
Late Permian a ginkgo, cycads, the cycads, conifers and other gymnosperms , the show began with the appearance of health.
晚二疊世出現了銀杏、蘇鐵、本內蘇鐵、松柏類等裸子植物，開始呈現中生帶的面貌。
used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales.
用于某些分類系統中；一個滅絕的裸子植物化石群，與蘇鐵蕨目同域。
an ancestral fossil type from which modern gymnosperms are thought to have derived.
作為今天被子植物祖先的原始化石品種。
A multicellular, often flask - shaped, egg - producing organ occurring in mosses, ferns, and MOST gymnosperms.
藏卵器在苔蘚、蕨類及大多數裸子植物中的多細胞的，常為燒瓶狀的產生卵子的器官
The occurrence of haploid endosperm in the gymnosperms provides a sound basis for further investigations into progenies.
裸子植物中單倍體胚乳的存在，為進一步對于后代的研究提供良好的基礎。
These genes are characterized by several distinct motifs and exist in ferns, gymnosperms , and angiosperms.
該類基因具有特征性基元，并存在于蕨類植物、裸子植物和被子植物中。
Most gymnosperms retain archegonia except for the most advanced genera Gnetum and Welwitschia.
除了買麻藤屬和百歲蘭屬以外大多數裸子植物還保留有頸卵器。
Title An outline of embryological characters of gymnosperms in relation to systematics and phylogeny.
裸子植物的胚胎學特征及其與分類、系統發育的關系。
In gymnosperms it gives rise to the body cell and stalk cell.
裸子植物的生殖細胞可形成體細胞和柄細胞。
Different opinions on the origins and evolutions of pteridophytes and gymnosperms.
蕨類植物和裸子植物的起源與進化。
Archegonium The female sex organ of the mosses, ferns, club mosses, horsetails, most gymnosperms, and some red and brown algae.
一些苔蘚，蕨類，紅藻，褐藻和裸子植物中的雌性生殖器官。
integument A layer surrounding the nucellus in the ovules of gymnosperms and angiosperms.
是裸子植物和被子植物的胚珠中包裹珠心的結構。
Gymnosperms , the majority still retain the structure neck eggs, eggs in egg-neck in the formation.
裸子植物中的大多數仍保留頸卵器的結構，卵在頸卵器內形成。
Late Triassic, gymnosperms , the mainland has become the real rulers of the main plant.
晚三疊世時，裸子植物真正成了大陸植物的主要統治者。
Carboniferous period, the early gymnosperms (such as etc. ) is very impressive, but the number of ferns most abundant.
石炭紀時，早期的裸子植物（如蘇鐵、松柏、銀杏等）非常引人注目，但蕨類植物的數量最為豐富。
Areography of the gymnosperms of China (1): Distribution of the Pinaceae of China.
中國裸子植物分布區的研究（1）——松科植物的地理分布。
In the gymnosperms the megaspore gives rise to a cell that is termed the embryo sac because of its similarity to the angiosperm structure.
在裸子植物中，大孢子也產生一個細胞，因為它類似于被子植物的胚囊細胞，故也可以稱之為胚囊。
These results have some significance in understanding the phylogeny of Ginkgo biloba and reproductive evolution of gymnosperms.
這些對探討銀杏的系統地位及裸子植物的生殖演化具有一定意義。
Gymnosperms to the development of terrestrial Jisheng period.
陸生的裸子植物發展到極盛期。
cone-bearing gymnosperms dating from the Carboniferous period;
產生于石炭紀的有球果的裸子植物；
Studies on free radical scavenging activities of extracts from fresh leaves of some Gymnosperms
一些裸子植物鮮葉提取物清除自由基的活性研究
A floristic analysis on the gymnosperms of Sichuan
四川裸子植物區系研究
Are all seeds of gymnosperms naked
裸子植物的種子是否都是裸露的
