下面3题我找不到答案,可否指点一下 [清华92转学考] 13. In general, how do algae and protozoans differ? a.Protozoans can move, and algae cannot. b.Algae are free-living, and protozoans are parasitic. c.Protozoans are autotrophic, and algae are heterotrophic. d.Algae are photosynthetic, and almost all protozoans are heterotrophic. e.Algae are prokaryotes, and protozoans are eukaryotes. (想法)我觉得b,c,e都错..而a,d不确定 14. Which of the following organisms forms gametes at some stage in their life cycle? a.Plasmodium 疟原虫 b.a cellular slime mold 单细胞黏菌 c.Paramecium 草履虫 d.Stentor can reproduce asexually (cell division) or sexually by conjugation e.Both a and b 我猜a 15. Alternation of generations is seen in the life cycle of a.Stentor b.amoeba c.Laminaria <--字典查不到,这是什麽? d.cyanobacteria e.Euglena 某些红,褐,绿藻有世代交替,所以我猜e 不知答案对不对? 清华连着三题不会写 XD --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 61.217.145.136 ※ 编辑: Supervirus 来自: 61.217.145.136 (02/05 04:10)