If there were periods of drought, any adaptations allowing the fish to survive the dry conditions would have been advantageous
Channing 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....
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. 词汇讲解...
One of the most significant evolutionary events that occurred on Earth was the transition of water-dwelling fish to terrestrial tetrapods (four-limbed organisms with backbones).Fish probably originated in the oceans, and our first records of them are in marine rocks.However, by the Devonian Perio...
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
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,...
One of the most significant evolutionary events that occurred on Earth was the transition of water-dwelling fish to terrestrial tetrapods (four-limbed organisms with backbones). Fish probably originated in the oceans, and our first records of them are in marine rocks. However, by the Devonian ...
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 ...
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...
Changes in climate during the Devonian may have had something to do with this if freshwater areas became progressively more restricted