--- Beautiful day, isn’t it? Shall we go out for a picnic? --- ______________! A. Sounds great B. Good luck C. You are right D. Have fun 答案:A基础知识填空:⑴半透膜模拟的是成熟植物细胞中的___________________。⑵与抗体合成、加工、分泌直接相关的具膜细胞器有_________________________。⑶在噬菌体侵染细菌的实验中,搅拌的目的是__________________________________。⑷若受体蛋白识别的信号分子是抗利尿激素,那么靶细胞是_____________________。⑸某生物种群中AA、Aa和aa的基因型频率分别为0.3、0.4和0.3。该种群中a基因的频率为_______________。