关于生物变异的叙述，正确的是（ ）
A．某人用眼不当导致近视不属于变异
B．不产生新物种就不是变异
C．变异为自然选择提供原材料
D．所有变异都能遗传给后代
遗传是指亲子间的相似性，虽然亲代的遗传物质通过生殖可以传递给子代，但子代与亲代之间以及子代的不同个体之间的遗传物质是不完全相同的，俗话说“一母生九子，九子各不同”，这正说明了变异的普遍性．变异是指子代与亲代之间的差异，子代个体之间的差异的现象．按照变异对生物是否有利分为有利变异和不利变异．有利变异对生物生存是有利的，不利变异对生物生存是不利的．按照变异的原因可以分为可遗传的变异和不遗传的变异．可遗传的变异是由遗传物质改变引起的，可以遗传给后代；由环境改变引起的变异，遗传物质没有改变，是不遗传的变异，不能遗传给后代．某人用眼不当导致近视属于变异，变异为自然选择提供原材料．
故选C．
第二节：下面采访中有5处（第61 – 65题）需要添加信息。请从以下选项中（A, B, C, D, E和F）中选出符合各段意思的选项，并在答题纸上将相应选项的标号涂黑。选项中有一项是多余选项。
小题1:_________________________________ There were the older jazz musicians who hung around our house when I was young. I saw how much they practiced, how serious they were about their art. I knew then I had to work just as hard if I wanted to succeed. Of course, my father inspired me a lot, and many teachers took the time to nurture my talent and the talents of other students in our school. 小题2:_____________________________ Yes. We’ve done such a poor job with music education because, as a society, we haven’t maintained the kind of education that a true artist and musician needs. Young people haven’t been able to equate romance and talent with music. For instance, most of the people who make it in the music industry today have to look good. How they sound is secondary. Sarah Vaughan, Bessie Smith, Ella Fitzgerald — those big, romantic queens of jazz music wouldn’t make it in today’s music industry, and that’s a shame. We need to teach young people about the alternatives. 小题3:______________________________ Around the world people make music that, if you listen carefully to it, sounds a little like the cadence of their language. I’d call it folk music. When I’m away from home, I make a point of listening to regional folk music, not what’s on the radio. 小题4:_______________________________ The same music is on the radio all over the world, and the American sound is overwhelming. Even the pop music that’s produced and created in foreign countries has that American beat, which underscore funk. As a musician, I’m not interested in hearing recycled versions of the same genre over and over. Any music that doesn’t have a development section just isn’t interesting to me. 小题5:_________________________________ The music press has so much to introduce these days, and jazz is just a small fraction of it. Because some people are intimidated by jazz, they don’t cover it unless it’s a big name. New jazz musicians don’t get much of break. A lot of editors don’t say anything about jazz these days unless it’s Marsalis. That’s a shame. What VH1 is doing with their Save the Music campaign is phenomenal. They’re getting all these instruments out to needy kids. It’s the kind of thing all networks should be doing. |
