题干

下列有关细胞中“一定”的说法,正确的是(  )

①光合作用一定在叶绿体中进行 ②有氧呼吸一定在线粒体中进行,有H2O生成的呼吸过程一定不是无氧呼吸,产生CO2的呼吸过程一定不是无氧呼吸产生乳酸的过程 ③没有细胞结构的生物一定是原核生物 ④以RNA为遗传物质的生物一定是原核生物 ⑤所有生物的蛋白质一定是在核糖体上合成的 ⑥有中心体的生物一定不是高等植物.

A:①③⑤

B:②④⑥

C:④⑤

D:⑤⑥

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D

同类题1

      The famous scientist and thinker, Charles Darwin, was born on February 12, 1809. His family lived not far from the River Severn, England.
Charles' father was a well-known doctor and the son of a still greater doctor and scientist. Charles' father hoped that his son would also become a doctor.
       As a boy Charles liked to go for walks in the fields and forests. He watched nature and compared what he saw with everything he had read in science books. He also liked collecting very much. He collected many things: eggs, stones, and leaves. His father did not like this, as Charles was not studying very well at school.
①为了成为一名医生,十六岁时达尔文就被送到爱丁堡大学(Edinburgh University) 学习。But he was interested in the history of nature.
Then he studied at Cambridge University until 1831.
       Some time later, he heard that the ship Beagle was going on a trip to South America and wanted a scientist. His professor advised him to go. He said the trip would be just for Darwin. So when the ship left England in December 1831, Darwin was on it. The research lasted almost five years. The Beagle studied the waters in the sea near South America. It also visited New Zealand, Australia and islands in the Pacific. Darwin saw many new plants and animals. He collected all kinds of plants, which he sent home from the places he visited.
When he returned home, Darwin was warmly greeted by his families and many friends.
        In 1842, Darwin went to live in Kent, where he continued his studies of the changes in nature. ②Darwin understood that plants and animals are not always the same, and that they really change.
By 1859, Darwin had finished his famous book The Origin of Species. It made a great hit in the world of science. ③He was opposed (反对) by the church and even by some scientists. But later, more and more scientists agreed with him.
Darwin continued his studies in science until he died in 1882.
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