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初中植学第十一章植物基本群第二节藻类教材中,提到水绵的有性生殖,如果我们在野外采集这种实验材料,是没有把握随时能够取得的,但我们能够培养出这种实验的材料来。现在介绍一下培养的方法。回忆去年我山东沂水中学,讲这节教材时,曾采了些水绵放在广口瓶里,使同学们观察它的外部形态,在显微镜下看它的细胞构造,可是很遗憾,没有看到它的有性生殖的
The eleventh chapter of junior high school plant basic group of plants The second section of algae teaching, mention sexual reproduction of sponge, if we in the field to collect this experimental material, is not sure at any time to obtain, but we can cultivate this Kind of experimental material to come. Now introduce the method of cultivation. Memories last year, I Yishui Middle School, Shandong, speaking of this section of teaching materials, had taken some sponge in jars to enable students to observe its external form, under the microscope to see its cell structure, but unfortunately, no See it for sexual reproduction