11.隱頭花序是_______的特征之一。（      ）

A.�？�                                                          B.胡桃科 

C.三白草科                                                   D.蓼科

12.葫蘆科植物的雌蕊由_______個心皮構(gòu)成。（      ）

A.1                                                               B.2   

C.3                                                               D.4

13.唇形科的雄蕊類型為（      ）

A.單體雄蕊                                                   B.聚藥雄蕊     

C.二強(qiáng)雄蕊                                                   D.四強(qiáng)雄蕊

14.金毛狗脊屬于（      ）

A.石松亞門                                                   B.水韭亞門     

C.真蕨亞門                                                   D.木賊亞門

15.莖、葉折斷后具有白色膠質(zhì)絲的科是（      ）

A.桔�？�                                                       B.茄科     

C.杜仲科                                                       D.薔薇科

16.大戟屬植物的花序為（      ）

A.總狀花序                                                   B.單歧聚傘花序     

C.二歧聚傘花序                                            D.杯狀聚傘花序

17.五加科的花序常為（      ）

A.傘形花序                                                   B.傘房花序     

C.輪傘花序                                                   D.復(fù)傘形花序

18.植物體常具膜質(zhì)托葉鞘的是（      ）

A.薔薇科                                                       B.木蘭科 

C.毛茛科                                                       D.蓼科

19.葉、花、果上常有透明油腺點的科是（      ）

A.菊科                                                          B.桔梗科 

C.蕓香科                                                       D.豆科

20.禾本科植物小穗基部的2枚苞片稱為（      ）

A.稃片                                                          B.穎片     

C.漿片                                                          D.鱗片