The monocotyledonous plants are (). A: Magnoliaceae B: Geographic isolation C: Nymphaeaceae D: Reproductive isolation E: Ranunculaceae F: Ecological<br/>isolation G: Alismaceae<br/>The<br/>liriodendron tulipifera in southeast America and tulip tree in south<br/>China keep the two species separated by (A) H: Mechanical isolation<br/>[单选题][2分][难度3]
The monocotyledonous plants are (). A: Magnoliaceae B: Geographic isolation C: Nymphaeaceae D: Reproductive isolation E: Ranunculaceae F: Ecological<br/>isolation G: Alismaceae<br/>The<br/>liriodendron tulipifera in southeast America and tulip tree in south<br/>China keep the two species separated by (A) H: Mechanical isolation<br/>[单选题][2分][难度3]
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