下面是人体细胞分裂时, A 、 B 、 C 、 D 四个不同细胞分裂时期染色体数目和 DNA 数目的统计数据的柱状图,那么非同源染色体上的非等位基因自由组合可以发生在
A.
A时期
B.
B时期
C.
C时期
D.
D时期
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Health is the most important thing in the world. Nothing is more important than health. If we take away our money, houses, cars or even our clothes, we can st...
【单选题】Which of the following statements about the elasticities and absorption approaches to explaining the impact of exchange rate changes on trade deficits is most accurate?
A.
Both the elasticities and absorption approaches consider trade and capital flows
B.
Under the elasticities approach, currency depreciation will result in greater improvement in the trade deficit when either import or export demand becomes more elastic
C.
Under the absorption approach, depreciation of the domestic currency will improve a trade deficit if it increases national expenditures relative to income