Second, once life began on Earth, simple early life-forms (photosynthetic bacteria) slowly but inexorably altered the environment in a manner that not only maintained life but also paved the way for later, complex life-forms. These changes allowed later organisms to evolve and thrive. Humans and...
TF240-Poisonous Insects and the Birds that Eat Them 362023-03 2 TF239-Early Life-forms and Earth’s Atmosphere 492023-03 3 TF238-The Greek Revival 412023-03 4 TF237-Debate About the Earliest Calendar 372023-03 5 TF236-Sleep 312023-03 6 TF235-Children’s Play 222023-03 7 TF234-Metamor...
This question has a two-part answer. First, Earth has been a cradle for life because of its position relative to the Sun. Second, once life began on Earth, simple early life-forms (photosynthetic bacteria) slowly but inexorably altered the environment in a manner that not only maintained lif...
Early forms of life on Earth, ___ in absence of oxygen, required other elements. A.which livedB.that livedC.livedD.were living 相关知识点: 试题来源: 解析 A 该题的考点是关于非限制性定语从句。本句中,该从句修饰主语early forms of life。非限制性定语从句中关系代词which不能省略,且that不能引...
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Early forms of life on Earth, ___ in the absence of oxygen, required elements such as sulfur instead. A. which lived B. whose life C. lived D. were living 相关知识点: 试题来源: 解析 A 测试点:定语从句。 答案:A 测试点:定语从句。 分析:句子主、谓语完整,主谓之间用逗号隔开的部分应为...
Early Earth and early life: an extreme environment and extremophiles - application to the search for life on Mars. In: Proceedings of the First European Workshop on Exo- Astrobiology.Westall, F., Brack, A., Barbier, B., Bertrand, M. & Chabin, A. 2002 Early Earth and early life: an...
Given these conditions, life must have been extremophile by definition. Although there are strong dissimilarities between the geological evolution of early Mars and early Earth, from a microbial point of view, the environmental conditions on both planets were very similar, although the wider range in...
一般来说，早期生命历史是指生命起源到“寒武纪大爆发”这段距今5.4亿年至35亿年的生命进化史。在这段时间内，地球上的生命经历了原核生物的发展、真核生物的起源和演化，后生动物和后生植物的起源和演化等重要进化事件。光学显微镜下的原始细菌 地球上最古老的化石（35亿年前）...
Early forms of life on Earth, ___ in absence of oxygen, required other elements. A.which livedB.that livedC.livedD.were living 点击查看答案&解析手机看题 你可能感兴趣的试题 单项选择题 We ___ having picnic for so long time. A.have desiredB.have hopedC.have looked forward toD.have ...