问题 选择题

大多数生物的生长发育都是从一个什么细胞开始的

A.受精卵

B.卵细胞

C.精子

D.体细胞

答案

答案:B

题目分析:多细胞生物体进行有性生殖时,精子与卵细胞融合形成受精卵,受精卵不断分裂、生长,进而分化形成多细胞生物个体,而多细胞生物个体的所有细胞都是由最初的同一个受精卵分裂、生长、分化来的,受精卵的细胞核中含有遗传物质染色体,里面带有遗传信息,这些信息是生物体建造自己生命大厦的蓝图,所以大多数生物的生长发育都是从受精卵开始的。

点评:此题为基础题,较易,解答此题需熟知胚胎的发育过程。

阅读理解

                                                              Summer Holiday Fun 2010!

     The summer holidays are upon us again.Here is our guide to summer holiday fun in Peterborough!

     Peterborough Museum

     The Age of the Dinosaurs is the museum's main attraction this summer. Get up close to prehistoric

creatures via some great handson exhibits! Watch out for monsters lurking around every ember! The

museum is open from 10:00 am to 5:00 pm Monday to Saturday,and from 12:00 pm to 4:00 pm on

Sundays in August.

     Call 01733 864663 for details.

     Saxon Youth Club

     School holiday fun: Young people aged 13~19 will be able to produce their own music, compete in

sports activities, or try their hand at cooking at Saxon Youth Club,Saxon Community Centre, Norman

Road, Peterborough every Monday and Wednesday from 3:00 pm. PLUS an aeroball tournament will

take place on Thursday, 12th August between 3:30 pm and 6:30 pm.

     Call 01353 720274 for details.

     Houghton Mill

     Through the Looking Glass-a new production of the family favorite on Monday 30th, August.Bring

rugs or chairs to sit on and a picnic if you wish to eat during the play. Gates open 5:30 pm, performance

6:30 pm~8:30 pm. Tea room will be open until the end of the interval.Adult £10. Child £7.Family £

20.

     Booking advisable on 0845 4505157.

     Farmland Museum and Denny Abbey

     Farmland Games: From Wellie Wanging to Pretend Ploughing matches, come and join the Farmland

Team. Collect your sporting stickers and create a colorful rosette that is fit for a winner! No need to

book, just turn up between 12:00 pm and 4:00 pm on Thursday, 19th August.Suitable for children aged

four and above, each child should be accompanied by an adult and all activities are included in the

normal admission price. Tickets Cost: £7 per child.

     For further information,call 01223 810080.

1. If you are interested in cooking, you can go to________.

A. Peterborough Museum  

B. Houghton Mill

C. Saxon Youth Club  

D. Farmland Museum

2. You want to watch the new play with your parents, so it will cost you________.

A. £7  

B. £17  

C. £27  

D. £20

3. Which of the following activities needs parents' company?

A. Playing farmland games.

B. Watching the new play.

C. Competing in sports activities.

D. Visiting the dinosaur exhibition.

4. If Tom comes to Peterborough Museum on August 19, he will have________to choose from for

himself.

A. one activity  

B. two activities

C. three activities  

D. four activities

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