问题
单项选择题
下列与生物进化相关的叙述不正确的是（）
A.地理隔离与生殖隔离的实质均是阻碍了天然的基因交流
B.同一物种不同种群间不能进行基因交流的原因是地理隔离所致
C.共同进化是指不同物种间及生物与无机环境间在相互影响中不断进化和发展
D.捕食者的存在客观上起到了抑制种群发展的作用
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
下列与生物进化相关的叙述不正确的是（）
A.地理隔离与生殖隔离的实质均是阻碍了天然的基因交流
B.同一物种不同种群间不能进行基因交流的原因是地理隔离所致
C.共同进化是指不同物种间及生物与无机环境间在相互影响中不断进化和发展
D.捕食者的存在客观上起到了抑制种群发展的作用
参考答案：D
| 短文改错。 | |
| My school is very big with several tall building. There is 2000 students in my school. We have a big playground and lots of trees around it. There are a lot flowers everywhere. We have lots of funs at school.After class we play games and do lots of sports,like playing the basketball, football and table tennis. Sometimes we have class meetings.They are very interested. I love my school so it's like a big family. The teachers in my school are as kind to us as our parent. I feel proud of my school because it is one of the best school. | 1. _____ 2. _____ 3. _____ 4. _____ 5. _____ 6. _____ 7. _____ 8. _____ 9. _____ 10. _____ |