题干

关于细胞核的叙述不正确的是 (   )

A:细胞遗传特性和细胞代谢的控制中心

B:在电子显微镜下观察分裂间期的真核细胞,可以看到细胞核的主要结构有核膜、核仁和染色体

C:真核细胞的核膜上有核孔,核糖核酸等大分子物质可以通过核孔进入细胞质

D:原核细胞的拟核没有核膜和核仁等结构

上一题 下一题 0.0难度 选择题 更新时间:2017-02-24 04:52:36

答案(点此获取答案解析)

B

同类题5

阅读理解

Favorite Books for Kids

Me and Marvin Gardens by A. S. King

    Image Source: Scholastic

    This middle-grade novel is perfect for introducing kids to recycling, but with a fun science fiction story. Obe lives on his family's farmhouse that was built a hundred years ago-and now it's being taken over by developers. While adventuring on the land, he discovers a creature, Marvin Gardens, which only eats plastic. Kids will love this charming story.

    Available from Amazon, $11.89

    Wrinkle in Time: A Guide to the Universe by Kari Sutherland

    Image Source: Disney Publishing World Wide

    Kids may get excited to see A Wrinkle in Time. While the original novel may be too hard of a read for them right now, they can dive into the fantastical world the film takes place in with this awesome guide to the characters and locations.

    Available from Amazon on March 6, $11.04

Rivers of Sunlight by Molly Bang and Penny Chisholm

    Image Source: Scholastic

    Get kids going green with a little help from this educational picture book! Filled with excellent artwork and helpful explanations, these pages are filled with important lessons about the Earth. Kids will learn about how the sun keeps the ocean currents(流)moving and how the sun can power all living things—it's pretty amazing.

    Available from Amazon, $7.67

How to Code a Sandcastle by Josh Funk

    Image Source: Penguin Random House

    Pearl's sandcastle keeps getting ruined by puppies (who could be mad at that?). So she teams up with her Robot friend Pascal to solve the problem with code(编码). Combining the fun of building a sandcastle with the discovery of coding, a future engineer will love paging through this story.

    Available from Amazon on May15, $16.99