问题 选择题

根据你所学的生物学知识判断下列说法,错误的是(  )

A.“春江水暧鸭先知”“大树底下好乗凉”前者表现出环境对生物的影响,后者则表现出生物对环境的影响

B.草履虫是单细胞动物,它通过纤毛完成运动,若它在载玻片上是顺时针方向运动,则通过显微镜观察到它在视野中的运动方向也是顺时针

C.多指症是由显性基因(A)控制的遗传病,如果一对夫妇,一方多指,一方正常,则所生子女患多指的几率为100%或50%

D.血液属于人体的营养组织,该组织中有RBC.若某男性的一个精子中性染色体组成为22条常染色体+X,则他成熟的RBC中染色体组成为44条常染色体+XY

答案

A、境中影响生物生活的各种因素叫环境因素,分为非生物因素和生物因素.非生物因素包括:光、温度、水、空气、土壤等.生物因素是指环境中影响某种生物个体生活的其他所有生物,包括同种和不同种的生物个体.“竹外桃花三两枝,春江水暖鸭先知.”体现了环境温度对生物的影响.春天温度升高,鸭子开始下水游泳;“大树底下好乘凉”是因为植物通过蒸腾作用,向空气中散发水分,带走大树周围的一些热量,从而降低了大树周围的温度,使得大树地下比较凉爽.这说明大树影响了周围环境的温度,属于生物影响环境.故不符合题意;

B、草履虫是单细胞动物,它通过纤毛摆动旋转运动,若它在载玻片上是顺时针方向运动,旋转180度后还是顺时针,则通过显微镜观察到它在视野中的运动方向也是顺时针.故不符合题意.

C、生物体的某些性状是由一对基因控制的,而成对的基因往往有显性和隐性之分,

显性基因控制显性性状,隐性基因控制隐性性状,当控制某个性状的基因一个是显性,一个是隐性时,只表现出显性基因控制的性状.多指(如六指)是由显性致病基因控制的.父母双方的一方是多指其基因组成是AA或Aa,另一方正常,其基因组成是aa.控制多指与正常的基因在亲子代间的传递如图:因此他们所生子女患多指的几率为100%或50%.故不符合题意;

D、血液是由血细胞和血浆(细胞间质)两部分组成.血液属于结缔组织,有营养、保护等功能.RBC是红细胞的英文缩写,成熟的红细胞没有细胞核,而染色体位于细胞核中,因此若某男性的一个精子中染色体组成为22条常染色体+X,则他成熟的RBC中染色体组成为0.故符合题意.

故选D

阅读理解

阅读理解。

     Good morning. The program today is about music. The word "music" comes from the Greek word

"muse". The Muses are the goddesses of the arts,  Music is only one of the arts. It is like the spoken

language, but it uses sounds. Today's program brings together music from different corners of the world. Who invented music? Who sang the first song? No one knows exactly the answers to these questions.

But we know that music plays an important part in almost everyone's life. Babies and young children love

to hear people singing to them. When they are a little older, they like to sing the songs they have heard.  

When children go to school, their world of music grows. In the middle grades students take music

lessons. When they reach high school, they become interested in listening to pop music.

     The records we have chosen for you today are from American country music, Indian music, pop

music and so on. Music has meaning for everyone. It can make people happy or it can make them sad.

In this program we shall study the language of music. We shall be trying to find out more about how

music works. We shall try to find out how music says what people feel.

     Now, here comes the music today, I shall explain why they are all good music...

1. The first paragraph is mainly about the ________

A. styles of music

B. history of music

C. taste of music

D. knowledge of music

2. The speaker is probably ________ .

A. a host                  

B. a singer

C. a dancer                  

D. a teacher

3. Which is TRUE according to the passage?

A. The Muses invented music.

B. Music can bring people some feeling?

C. Music was from a Greek village.

D. Everyone is interested in pop music.

4. The speaker believes that ________ .

A. music is a spoken language

B. music develops as we grow up

C. music is above the other arts

D. music plays an important part in our life

5. What is NOT the purpose of this music program?

A. To study the language of music.

B. To learn more about the music.

C. To give a complete background to the music.

D. To give people some music to listen to.

单项选择题