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...
From Fish to Terrestrial Vertebrates 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...
From Fish to Terrestrial Vertebrates 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 marin...
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...
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 ...
TPO44-Passage1-From Fish to Terrestrial Vertebrates 2017-10-09 14:04:3900:36 260 所属专辑:边词边题单词书音频 喜欢下载分享 声音简介 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...
2019-02-21 09:45:2921:27295 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 ...
This represents the first evidence of these vertebrates in the basin. The superposition of fish trails and tetrapod trackways strongly suggests tidal processes in a marginal-marine depositional setting. This interpretation agrees with recent sedimentological, geochemical and palynological data from the ...