正确答案: C
雄蕊和雌蕊
题目:兰科植物的合蕊柱由( )合生而成。
解析:C
查看原题
举一反三的答案和解析:
[单选题]百合的学名为Lilium brownii var.viridulum,可见百合是L.brownii的一个( )。
变种
[单选题]Young hoatzins are different from their parents in that .
they have claws on the wings
[单选题]—Why do you want to work for our company?
—This is the job that I for.
have been looking
[单选题]The passage is probably followed by a concluding paragraph about .
Fitzgerald’s contributions to the literary world
[单选题]菊科植物花序外包被着的绿色部分是副萼。( )
错误
[单选题]基因A、a和基因B、b分别位于不同对的同源染色体上,一个亲本与aabb测交,子代基因型为AaBb和Aabb,分离比为1:l,则这个亲本基因型为
AABb B.AaBb
解析:一个亲本与aabb测交,aabb产生的配子是ab,又因为子代基因型为AaBb和Aabb,分离比为1:l,由此可见亲本基因型应为AABb。