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gymnosperms

美 [dʒɪm'nɒspəmz]英 [dʒɪm'nɒspəmz]

n.【植】裸子植物
网络裸子植物类；裸子植物门；种子植物只分爲裸子植物

复数：gymnosperms

gymnosperms

gymnosperms

n.

英-汉英-英网络释义

gymnosperms

n.

1.【植】裸子植物

1

Its native gymnosperms could evolve into a few species capable of growing in the warm, moist forests of Queensland .

本地的裸子植物可进化成能在昆士兰温暖湿润林区的树种。

2

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陆地上繁衍生息，而低等植物是无法做到的。

4

primitive tropical gymnosperms abundant in the Mesozoic , now reduced to a few scattered tropical forms .

跃于中生代，现在退化为一些分散的热带形式。

6

In gymnosperms , the egg into the neck with only one of the two sperm and egg fusion .

在裸子植物中，进入颈卵器的两个精子只有一个与卵融合。

7

Late Permian a ginkgo , cycads , the cycads, conifers and other gymnosperms , the show began with the appearance of health.

晚二叠世出现了银杏、苏铁、本内苏铁、松柏类等裸子植物，开始呈现中生带的面貌。

8

used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales.

用于某些分类系统中；一个灭绝的裸子植物化石群，与苏铁蕨目同域。

9

an ancestral fossil type from which modern gymnosperms are thought to have derived.

作为今天被子植物祖先的原始化石品种。

12

These genes are characterized by several distinct motifs and exist in ferns , gymnosperms , and angiosperms .

该类基因具有特征性基元，并存在于蕨类植物、裸子植物和被子植物中。

13

Most gymnosperms retain archegonia except for the most advanced genera Gnetum and Welwitschia.

除了买麻藤属和百岁兰属以外大多数裸子植物还保留有颈卵器。

14

Title An outline of embryological characters of gymnosperms in relation to systematics and phylogeny .

裸子植物的胚胎学特征及其与分类、系统发育的关系。

15

In gymnosperms it gives rise to the body cell and stalk cell .

裸子植物的生殖细胞可形成体细胞和柄细胞。

16

Different opinions on the origins and evolutions of pteridophytes and gymnosperms .

蕨类植物和裸子植物的起源与进化。

17

Archegonium The female sex organ of the mosses , ferns , club mosses, horsetails, most gymnosperms, and some red and brown algae .

一些苔藓，蕨类，红藻，褐藻和裸子植物中的雌性生殖器官。

18

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结构。

19

20

Late Triassic , gymnosperms , the mainland has become the real rulers of the main plant .

晚三叠世时，裸子植物真正成了大陆植物的主要统治者。

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