一道试题分析

• 出 处: 生物学通报
• 发表日期: 1993年08期
• 关键词: 海洋环境 试题分析 异养 厌氧型 大气成分 还原性气体 氮基酸 无机盐类 周围环境 游离氧

裸子植物比蕨类植物更适于陆地生活的特征是( )。A.大都是高大的乔木B.受精脱离了水的限制C.有了根、茎、叶的分化D.胚珠有子房壁包被着分析:解答此题需要掌握蕨类植物和裸子植物的主要特征,还要善于比较分析两个植物类群的相互关系及它们与环境的关系。这个题较难,属于掌握层次的试题。在植物的进化过程中,裸子植物能取代蕨类植物,

The characteristics that gymnosperms are more suitable for terrestrial life than ferns are (). A. mostly tall trees B. fertilization out of the water restrictions C. with roots, stems, leaves of the differentiation D. ovules have ovary wall coating analysis: answer this question need to master the ferns and gymnosperms The main features are also good at comparative analysis of the relationship between two plant groups and their relationship with the environment. This problem is more difficult, it belongs to the level of questions. In the evolution of plants, gymnosperms can replace ferns.