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生物 高校生

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Test II PROBLEM SOLVING Directions: Answer the question and show your complete solution in the separate paper. 1. Suppose the cells lining of your cheeks can completely di vide every 24 hours. Assuming no cells die in the process, how many cheek cells will be there after 7 days if you started with 5 cheek cells? 2. If an organism has 15 pairs of homologous chromosomes, how many chromosomes will each daughter cell have after telophase of mitosis? Test I. Complete the concept in mitosis has the Cell division Purpose of which have occurs in through (10. condeneed which Includes or noncondensed which include 5。 温 a loop of DNA which Includes (in order) which form sister 9. during 12. (13. 14. which is followed by 15. which Is followed by (16. which includes (in order). 17. 19. >(20. What's New In meiosis the cell goes through similar stages in mitosis and uses similar strategies to organize and separate chromosomes. However, the cell has a more complex task in meiosis. It still needs to separate sister chromatids (the two halves of a duplicated chromosome), as in mitosis. But it must also separate homologous chromosomes, the similar but non-identical chromosome pairs an organism receives from its two parents. These goals are accomplished in meiosis using a two-step division process. Homologue pairs separate during a first round of cell division, called meiosis I. Sister chromatids separate during a second round, called meiosis III. Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase. Stages of Meiosis I In meiosis I, homologous chromosomes are separated into two cells such that there is one chromosome (consisting of

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英語 中学生

英語分かりません(´・ω・`) かぎかっこの中の問題です。 21から最後まで

(18) Theodore's computer, ( ) his mother gave him three years (23) A: John, are you interested in going to a kabuki performance ago, stopped working last night. 1where 2 how 3 which with me next weekend? 4 whose B: I don't know, Yuko. I've never seen kabuki before, ( A: You can get an English program. Ie'll tell you about the 23 ) (19) A: Have you heard the company is going to holda party for the story. employees next month? B: Yes, but I'm ( 1 around ) the plan. I think it's a waste of money. 4 against B: That would help. In that case, Id love to go with you. 2 Where is the theater? 4 Have you been before? 2 below 3 without 1 Is it expensive? 3 Will I understand it? (20) A: Have you seen Timothy? I need to talk to him. B: He's outside, ( 1 was talking 2 talking )on his cell phone. 3 talk (24) A: Hi, Tm Peter. You must be the new employee in the company. B: Yes. My name is Jordan. I just started working in the sales department. A: I work in the marketing department, across the hallway from you. ( 24 ) B: That would be nice. I don't know many places to eat around here yet. 4 talked 次の六つの会話文を完成させるために, (21) から (28) に入るものとして最も適切 2なものを 1, 2, 3, 4の中から一つ選び,その番号を解答用紙の所定欄にマーク しなさい。 (21) A: The TV news said it's going to rain later today. B: I know, but they're often wrong. They said that yesterday would be warm, ( A: Well, it must be hard to know what the weather is going to be. B: I guess so. But it would be nice if we could know for sure. 1 We should go out to lunch sometime. 2 Let me introduce you to my boss. 3 I'll show you where my department is. 4 You can use my office if you like. 21 ) A: Billy, do you have soccer practice this afternoon? B: Yeah, Mom. And I'm going to the library to get a book after that. A: ( 25 B: Practice ends at 5:30, so I think so. A: But the library closes at five o' clock on Sundays. B: Oh, no! ( 26 ) A: Well, I can go and get it for you while you're at practice. B: Really? Thanks a lot. I'Il tell you the title before I leave. 1 because it's raining now. 2 but it was actually quite cool. 3 and I watched the weather report. 4 since it's warm today. (22) A: Have you volunteered for that experiment the science professor is doing next Friday? B: Yes, I have. He's going just one hour! A: Wow, that's a lot of money. ( 22 ) B: I'm not sure, but I could ask the professor for you. pay people $50 to help him for (25) 1 Are you finished with your homework? 2 Are you sure you'll need a book? 3 Will you play soccer there? 4 Will you have time to go there? 1 Do you think I could doit, too? 2 Aren't you nervous about it? 3 Isn't that too much money? 4 How many days will it take? (26) 1 The book is too long for me. 2 The library won't have the book. 3 Ineed the book for my report. 4I forgot the title of the book. 16

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