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...
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 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 ...
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 Life-forms and Earth’s Atmosphere Paragraph 1: Why has life flourished on Earth? 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 ...
You may wonder if light is also needed for life to form. Until___47___, scientists thought that light was essential. But now, places have been found on earth that are in total blackness such as caves several miles beneath the surface. And bacteria,___48___ forms of life, have been...
life formsliving organismphysical theoryphysical‐chemical lawssoil erosionSeeking to understand how life appeared on Earth also means looking for the fossil traces of the first cells, which inevitably leads to the question of how big the smallest living organism is. Traces of ancient life may be ...
Major evolutionary transitions, including the emergence of life, likely occurred in aqueous environments. While the role of water’s chemistry in early life is well studied, the effects of water’s ability to manipulate population structure are less clear. Population structure is known to be critica...
(32)___are in total blackness such as caves several miles beneath the surface.And bacteria,primitive forms of life,have been seen there.So the lack of light in Europa's sub-surface ocean doesn't automatically rule out life forming.Istanbul has just been named the hottest destination for ...
Cytosolic multiprotein oligomer of the innate immune system responsible for the activation of the inflammatory responses. Asthma endotypes Forms of asthma with distinct mechanistic pathways that have therapeutic and prognostic implications. Neutrophil extracellular traps Networks of extracellular fibres, produced...