1.Một tế bào đang nguyên phân, ở kỳ giữa người ta đếm được 22 cặp nhiễm sắc thể kép, số tâm động của tế bào trên khi đang ở kỳ sau là bao nhiêu? 2.Một tế bào sinh dục sơ khai đực ở kỳ trước nguyên phân có 12 nhiễm sắc thể kép. Tế bào này nguyên phân 5 lần rồi giảm phân tạo tinh trùng. Số tinh trùng tạo thành là bao nhiêu? Mọi người giúp mình với ạ.Xin cảm ơn rất nhiều

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EXERCISES 1. Choose the odd one out. 1. A. paintings B. lanterns C. tourists D. drums 2. A. remind B. take over C. set up D. look round 3. A. park B. lacquerware C. zoo D. museum 4. A. bronze B. gold C. iron D. cloth 5. A. carve B. sweater C. weave D. mould 2. Find the word with different sound in the underline part in each line. 1. A. wanted B. worked c. walked D. stopped 2. A. goes B. watches c. misses D. brushes 3. A. judo B. mother c. open D. homework 4. A. nation B. question c. action D. education 5. A. who B. when c. where D. what 3. Complete the following sentences with the correct comparative forms of the adjectives. 1. Ho Chi Minh City is a__________(big) city than Ha Noi. 2. After exercising regularly, she looked__________(thin) than last year. 3. Houses in big cities are a lot__________(expensive) this year than last year. 4. People in the countryside lead a__________(simple) life than those living in the city. 5. Be________(careful) with your report. You have made a lot of typos in the previous one. 4. Choose the best answer to complete each of the following sentences. 1. My history teacher is one of the person I know A. funnier B. more funny C. funniest 2. My younger sister is of my family. She never does anything. A. lazyest B. the laziest C. most lazy 3. John is the friend of mine. He never cares about money. A. more generous B. generousest C. most generous 4. Today is the day in my life. I have been informed that I failed the exam. A. most sad B. saddest C. sadder 5. They were the employees, so they received bonuses. A. hard workingest B. hardest working C. working the hardest 6. She is the woman I have ever met. A. politest B. more polite C. politeest 7. I was the I could, but the machine was out of work anyway. A. carefulest B. most carefulest C. most careful 8. It was the movie I have ever seen. A. baddest B. worse C. worst 9. The way of going to the city center is by bus. A. better B. goodest C. best 10. He was the interested in the plan, so I didn’t want to explain to him. A. littlest B. less C. least 5. Underline the mistake and rewrite the correct sentences. 1. Her performance is more wonderfuller than mine. → 2. Tom is more older than his cousin. → 3. New York is a bigger city as Paris. → 4. English traditions are very different than continental. → . 5. This is the more interesting film I have ever seen.