请将下列俗语与对应的现象连线。

                                                                           一方水土养育一方人

                                                                           桂实生桂，桐实生桐

遗传现象                                                               虎父无犬子

变异现象                                                              一树之果有苦有甜，一母之子有愚有贤

                                                                           种豆其苗必豆，种瓜其苗必瓜

                                                                           橘生淮南为橘，生淮北为枳