题目

某二倍体动物细胞内含10条染色体、10个DNA分子，且细胞膜开始缢缩，则该细胞( ) A．处于有丝分裂中期  B．正在发生基因自由组合 C．将形成配子  D．正在发生DNA 复制   答案：C题中细胞膜开始缢缩，推测为后期，而细胞内含有10条染色体，则细胞两极分别含有5条染色体，而该生物为二倍体生物，由此推测处于减数第二次分裂后期，将形成配子。连词成句。【1】evening, they, what, going, tomorrow, are, to, do ( ? )What _______ you going to do ________ _______?【2】I, home, Tina, walking, are, school, after, and ( . )Tina and I are _______ _________ _______ dinner.【3】forest, the, on, outing, children, are, the, in, an ( . )The children are _______ an _______ in the _______.【4】to, what, we, keep, school, clean, can, do, our ( ? )What _______ we do to _______ our school _______?【5】why, we, drink, I, know, shouldn’t, juice, here ( . ) I know _______ we ______ drink ______ here.