细胞是生物体结构和功能的基本单位，又是新陈代谢的主要场所。据图回答：
科学家依据 （）将细胞分为原核细胞和真核细胞。以上4个图中属于原核细胞的是（） (填字母)，共有的细胞器是（） ，能进行光合作用的是 （）(填字母)，其能进行光合作用的原因是具有 （）。
参考答案：是否有细胞核；C D；核糖体；A D 叶绿素
解析：原核细胞和真核细胞最根本的区别是原核生物没有核膜。由图分析可知：A有细胞壁、叶绿体、液泡，是能进行光合作用的成熟的植物细胞；B有中心体，属于动物细胞；C属于原核生物的细菌；D属于原核生物中的蓝藻，蓝藻有叶绿素，也能进行光合作用。原核生物只有核糖体，因此所有的细胞生物共有的细胞器是核糖体。能进行光合作用的是A和D。
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| Curt and I have this kind of friendship that I wish everyone would be able to experience. Our friendship 1 many years ago. We met while 2 different high schools. As years passed, we became good friends. Curt was the best man (伴郎) at my wedding, and I was 3 a few years later when he married my sister's roommate. And yet the event that almost showed our partnership and 4 our friendship happened over 25 years ago, when we were in our 20's. Curt and I were attending a pool party at the local Swim and Racquet Club. We were walking to the car, joking about the party, and Curt 5 ne and said, "Steve, your ve had too much 6 . Maybe I should drive." At first I thought he was 7 , but since Curt is definitely the wiser of us, I 8 his judgment. "Good idea." I said, and handed him the 9 . After I was settled in the passenger seat and Curt sat behind the wheel, he said, "I'm going to need your 10 because I'm not sure how to get to your house from here." "No problem," I 11 . Curt started the car and we were 12 . The next ten miles seemed like a hundred as I prompted (提示) Curt with 13 -left now, right soon, slow down, speed up and so on. The important thing was that we got home 14 that night. Ten years later at my wedding, Curt brought 15 to the eyes of 400 guests as he told the story of our partners hip and 16 we drove home together that night. Why was it such a (n) 17 story? We would all offer our keys 18 we knew we shouldn't drive. But you see, my friend Curt was blind. He had been blind from 19 and never sat behind the wheel of a car 20 that night. | ||||
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