问题
解答题
如图是细菌和酵母菌结构示意图，请根据图回答：（括号内填写标号，横线上填写文字）：
（1）细菌与酵母菌共有的结构是：
[______]______、[______]______、[______]______．
（2）细菌与酵母菌的主要区别是：细菌只有
[______]______，而没有真正的______．
（3）从生殖方式上看，细菌的生殖方式是______生殖，而酵母菌的生殖方式包括______生殖和______生殖．
答案
细菌的基本结构有细胞壁、细胞膜、细胞质和DNA集中的区域，没有成形的细胞核，没有叶绿体；酵母菌的基本结构有细胞壁、细胞膜、细胞质、细胞核，没有叶绿体．
（1）细菌与酵母菌共有的结构是：①细胞壁；②细胞膜；⑤细胞质．
（2）细菌与酵母菌的根本区别在于酵母菌具有④成形细胞核，细菌没有成形的细胞核，只有③DNA集中的区域，没有核膜，这样的结构叫拟核或原核．
（3）从生殖方式上看，细菌的生殖方式是分裂生殖，一个分成两个，而酵母菌在环境条件较好时，比如营养充足，温度适宜进行出芽生殖，在条件不良时又可以进行孢子生殖．
故答案为：
（1）①细胞壁；②细胞膜；⑤细胞质；
（2）③拟核；细胞核；
（3）分裂；出芽；孢子．
subjects. Well, Bacon tells you to “look at weak places in your armor (盔甲)”, and shows you how to fill up the blanks in your knowledge. On the other hand, it is no good just trying to fill your mind with knowledge. Knowledge in itself is often useless. A mind filled with too much knowledge is like a room too full of furniture; a man cannot walk about freely in it, and look out of the windows. It is much better to concentrate on a few subjects that interest you and to deal lightly with the others than to march heavily through the whole range of learning, like a silly tourist going through a museum and not missing a single object. If you try to master every subject you may become very wise, but you will be very lonely and you will probably lose all your friends. So you must learn to pick and choose, and you must also learn to look here and there in a library like a camel eating grass on the grassland. If you watch it eating, you will see that although he is supposed to be one of the most stupid animals in the world, he has at least one of the qualities of the cultured man, the power to pick and choose. A student looking for mental food in a library should take the camel as his model.