下图为青蛙的发育过程，请据图回答：(1)青蛙的个体发育起点是[]________。从整个发育过程来看，青蛙的发育属于________。(2)从图中可以看出[]最像鱼，从外形上看像鱼的特点是-八年级生物

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• 下面是青蛙变态发育的过程，请将其按正确的顺序排列①尾和鳃逐渐消失，形成肺②同鱼的形态十分相似③长出前肢④长出后肢⑤有尾，也有后肢[]A．①③②④⑤B．④③⑤①②C．②③④⑤①D．②④③⑤①-八年级生物
• 个体发育属于变态发育的是[]A．大鲵B．鲫鱼C．蜥蜴D．蛇-八年级生物
• 蝌蚪用________呼吸，青蛙用________呼吸。-八年级生物
• 下列关于动物生殖和发育方式的描述中，错误的是[]选项生物种类受精方式发育方式A金鱼体外受精体外发育B青蛙体外受精体外发育C家鸡体内受精体外发育D蝴蝶体外受精体外发育-八年级生物
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• 两栖类的代表动物青蛙，其生殖和发育过程包括如下几个阶段：①蛙的卵块；②雌雄蛙抱对；③蝌蚪；④成蛙；⑤雄蛙鸣叫。请指出正确的排列顺序。[]A．⑤④②①③B．②⑤①③④C．⑤②①③④D．②①⑤③④-七年级
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• 青蛙的生殖发育特点是[]A．雌雄同体、体内受精、体内发育B．雌雄同体、体外受精、体外发育C．雌雄异体、体内受精、体内发育D．雌雄异体、体外受精、体外发育-八年级生物
• “黄梅时节家家雨，青草池塘处处蛙。”春末夏处，青蛙“呱、呱、呱”的叫声此起彼伏。如果寻声找去，你会发现池塘中的青蛙正在抱对。不久，如果你再来，会在水中看到小蝌蚪。如果-八年级生物
• 青蛙的变态发育大约经历多少天[]A．30多天B．40多天C．50多天D．60多天-八年级生物
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