产品分类
新闻动态 当前位置:首页>新闻动态>新闻动态

什么是种子植物

网址:www.dzyangguang.com.cn  2022-08-10  作者:admin    阅读:

什么是种子植物,裸子植物,被子植物?如何区分裸子植物和被子植物?
What are seed plants, gymnosperms, angiosperms? How to distinguish between gymnosperms and angiosperms?
种子植物是植物界最高等的类群。所有的种子植物都有两个基本特征:(1)体内有维管组织韧皮部和木质部;(2)能产生种子并用种子繁殖。种子植物可分为裸子植物和被子植物。裸子植物:种子裸露,胚珠无心皮包被,不形成果实。被子植物:种子不裸露,胚珠包被于心皮内,形成果实。
Seed plants are the highest group of plants. All seed plants have two basic characteristics: (1) vascular tissue, phloem and xylem; (2) It can produce seeds and reproduce with seeds. Seed plants can be divided into gymnosperms and angiosperms. Gymnosperms: the seeds are bare, the ovules have no pericarp, and do not form fruits. Angiosperms: the seeds are not exposed, and the ovules are wrapped in the carpel to form fruits.
裸子植物的特征有哪些?
What are the characteristics of gymnosperms?
乔木,灌木,罕为木质藤本。叶多为针形、鳞形、条形、椭圆形、披针形、罕为扇形;花单性,罕两性;胚珠裸露,不为子房包被;种子有胚乳,胚直生,子叶二至多数。
Trees, shrubs, rarely woody vines. The leaves are mostly needle shaped, scale shaped, strip-shaped, oval, lanceolate and rarely fan-shaped; Flowers unisexual, rarely bisexual; Ovule naked, not covered by ovary; The seed has endosperm, the embryo is straight, and the cotyledons are two to many.

返回新闻

电话
13930239512