agnathous fish lack jaws and paired fins.
无颌鱼类没有下颚和成对鳍。
the study focused on the evolutionary history of agnathous vertebrates.
该研究侧重于无颌脊椎动物的进化史。
agnathous animals are an ancient group with a long fossil record.
无颌动物是一个古老的群体，拥有悠久的化石记录。
hagfish and lampreys are examples of agnathous fish.
七鳃鳗和深渊鱼是无颌鱼类的例子。
agnathous vertebrates differ from other vertebrates in their skull structure.
无颌脊椎动物的颅骨结构与其他脊椎动物不同。
understanding agnathous anatomy is crucial for evolutionary biology.
理解无颌动物解剖学对进化生物学至关重要。
agnathous fish have a unique feeding mechanism that involves suction.
无颌鱼类具有独特的摄食机制，涉及吸力。
the study of agnathous evolution sheds light on the origins of vertebrates.
研究无颌动物的进化可以阐明脊椎动物的起源。
agnathous fish are often found in deep, cold waters.
无颌鱼类通常生活在深、冷的水域中。
despite their primitive appearance, agnathous animals have complex sensory systems.
尽管它们看起来原始，但无颌动物拥有复杂的感官系统。
agnathous fish lack jaws and paired fins.
无颌鱼类没有下颚和成对鳍。
the study focused on the evolutionary history of agnathous vertebrates.
该研究侧重于无颌脊椎动物的进化史。
agnathous animals are an ancient group with a long fossil record.
无颌动物是一个古老的群体，拥有悠久的化石记录。
hagfish and lampreys are examples of agnathous fish.
七鳃鳗和深渊鱼是无颌鱼类的例子。
agnathous vertebrates differ from other vertebrates in their skull structure.
无颌脊椎动物的颅骨结构与其他脊椎动物不同。
understanding agnathous anatomy is crucial for evolutionary biology.
理解无颌动物解剖学对进化生物学至关重要。
agnathous fish have a unique feeding mechanism that involves suction.
无颌鱼类具有独特的摄食机制，涉及吸力。
the study of agnathous evolution sheds light on the origins of vertebrates.
研究无颌动物的进化可以阐明脊椎动物的起源。
agnathous fish are often found in deep, cold waters.
无颌鱼类通常生活在深、冷的水域中。
despite their primitive appearance, agnathous animals have complex sensory systems.
尽管它们看起来原始，但无颌动物拥有复杂的感官系统。
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