如图为长颈鹿的进化示意图请据图回答.1图a说明古代长颈鹿祖先的个体之间颈的长短存在着差异差异颈的长短是可以遗传遗传的.2图b说明 Template




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tomski如图为长颈鹿的进化示意图请据图回答.1图a说明古代长颈鹿祖先的个体之间颈的长短存在着差异差异颈的长短是可以遗传遗传的.2图b说明 coloring