生物专业英语第六课-5

系统 进化分枝图
作业 复习前五课的重点词汇和句式 课堂练习 选择 ① Chromoplasts are a type of ( ). A.pigment B.storage bin C.nutrient tank D.plastid ② During protein synthesis a single mRNA molecule may be associated with several ribosomes to form ( ). A.a gene B.a lysosome C.a polysome D.smooth endoplasmic reticulum
③ In the first stage of photosynthesis water is ( ). A.oxidated B.phosphotylated C.reduced D.heated ④ In the ligjt-independent reactions of photosynthesis, the first electon acceptor for atmospheric CO2 is ( ) A.PGA. B. ATP C. RUBP D. a carbohydrate subunit ⑤ DNA is replicate during the ( ). A.S phase B. M phase C.G2 phase D. G1phase
⑤ ⑥ ⑦ ⑧ ⑨
Chalones promote cell division. Plant cells have the most prominent centrioles. Alleles are simply alternate forms of genes. Test cross helped establish the law of segregation. Watson and Crick did not make use of X-ray diffraction date. ⑩ The sequence of bases on the DNA molecule carries the genetic information
作业
翻译句子
① ② ③ ④ ⑤
Lysosome contain…… Chlorophyll a molecule…… Meiosis is a special…… He also recorded …… P.A.levene discovered that……
课堂练习 判断
① Both prokaryotic and enkaryotic cells have a supporting cytoskeleton. ② The nuclear envolope is produced by the rough endoplasmic reticulum. ③ The Calvin-Benson cycle may take place either in light or in the dark. ④ Light-dependent reactions take place in the ch百度文库oroplast stroma.
来自于生物化学和比较解剖学等亚生物学领域的证据有助于划分物 种和更高级的分类单位，然而物种最初依据形态学特征进行分类 的，今天生物学家大体上使用孤立多产的群体作为标准。
分类学揭示了物种间进化的大量关系。进化枝中 的成员来自一个共同的祖先。 The Five Kingdoms 五界 进化系统树是进化关系的图解表现。教材中使用一 个通用的5界：原核原虫界、原生生物界、真菌界、 植物界、动物界。尽管这个系统是一个便利的组 织工具，5界划分可能不是正确的进化枝。