课堂教学实录师:在植物的类群部分,我们已经学习了藻类植物、菌类植物和地衣植物,由于这三类植物的结构都比较简单,没有根、茎、叶等器官的分化,在生殖上还没有出现真正的雌性生殖细胞和雄性生殖细胞,所以都属于低等植物。从今天开始我们将要了解一些较复杂、较高等的植物类群。这节课我将向大家介绍一类生长在阴湿的环境里,好象绿色绒毡似的植物(出示苔藓 Classroom Teaching Recorders: We have learned about algae, fungi, and lichens in the taxa of plants. Because these three types of plants are relatively simple in structure, there is no differentiation of organs such as roots, stems, and leaves. No true female germ cells and male germ cells have appeared yet, so they are all lower plants. Starting today we will have to understand some of the more complex and higher plant groups. In this class I will introduce you to a group of plants that grow in a damp environment, like a green carpet (showing moss