If there were periods of drought, any adaptations allowing the fish to survive the dry conditions would have been advantageous
小站托福备考平台为广大托福考生提供托福阅读tpo44 From Fish to Terrestrial Vertebrates(从鱼到陆地脊椎动物)According to paragraph 5, what was the main way that the earliest tetrapods differed from their imme答案及题目解析。小站教育,助力中国学生绽放出国留
C. Lobe-finned fish radiated into almost all available aquatic habitats. D. During the Devonian, lobe-finned fish were more common in marine than in freshwater habitats. 你的答案: 正确答案:B 题目解析: 登录后才能查看题目解析,还没有账号?马上注册...
A second adaptation of these fish was in the structure of the lobe fins. The fins were thick, fleshy, and quite sturdy, with a median axis of bone down the center. They could have been used as feeble locomotor devices on land, perhaps good enough to allow a fish to flop its way fr...
本题出自TPO44 Passage 1From Fish to Terrestrial Vertebrates 原句案例 Gills were undoubtedly the main source of oxygen for these fish, but the lungs served as an auxiliary breathing device for gulping air when the water became oxygen depleted, such as during extended periods of drought. ...
本题出自TPO44 Passage 1 From Fish to Terrestrial Vertebrates 原句案例 Gills were undoubtedly the main source of oxygen for these fish, but the lungs served as an auxiliary breathing device for gulping air when the water became oxygen depleted, such as during extended periods of drought. 词汇...
TPO44-Passage1-From Fish to Terrestrial Vertebrates 00:0000:36打开APP 收听完整版 此音频需要配合《托福边词边题》使用,现京东、当当网、亚马逊有售。边词边题将托福单词按照TPO阅读和听力顺序拆分成学习单元,用户可根据需要选择指定TPO的阅读或听力文章中的单词来学习。这样学习少量单词后就能直接进入TPO做题环节,...
所属专辑:硬啃之托福阅读 音频列表 1 TPO 43-3 El Niño 223 2018-04 2 TPO 44-1 From Fish to Terrestrial Vertebrates 295 2019-02 3 TPO 44-2 The Use Of Camera Obscura 193 2019-02 4 TPO 44-3 Seagrasses 268 2019-02 5 TPO 45-1 the Beringia Landscape ...
此外,植物已经出现在溪流和池塘附近的陆地栖息地,螃蟹和其他节肢动物也是这个最早的陆地群落的成员。因此,到了泥盆纪,淡水边缘的陆地栖息地可能是丰富的蛋白质来源,可以被容易爬出水的动物利用。来自牙齿的证据表明,这些最早的四足动物没有利用陆地植物作为食物;它们可能是肉食性的,没有发展出以植物为食的能力。第一批...
Fish were the earliest vertebrates (animals with backbones), able to live only in water. During the Devonian period (416-358 million years ago), a group of lobe-finned fish started a transition from water to land that ultimately led to the evolution of tetrapods-four-limbed animals including...