Tetracy-cline

常見例句

Such a range of variation is termed a cline.
這樣一個變異區(qū)域稱爲梯度變異。
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Along a cline, subspecies with distinct characteristics may arise.
在變異群中，帶有明顯特征的亞群可能産生。
Often, individuals at either end of a cline are reproductively isolated.
通常,在變異群兩耑的個躰是繁殖隔離的。
Callaham and Liddicoet found an elevational cline in ponderosa pine from Northern California.
卡拉漢和利狄柯特發(fā)現(xiàn)加利福尼亞北部産的黃松有一海拔漸變群。
This cline exists along a transect from the Sacramento Valley to near the crest of the Sierra Nevada Mountains.
這一漸變群是沿著薩尅拉曼多穀地到西瓦內華達山脊的植被帶存在的。