Starfish, sequoias, salamanders and the rest of the earth's residents may seem very diverse, but they are surprisingly similar on the molecular scale. ---- Planets and moons that have hints of liquid water have been ranked high on the list of potential sites for life-detection missions. (A) All species that scientists have studied need liquid water to survive, for example. (B) Further they all rely on DNA to carry genetic information, and they all use that information to build proteins from the same set of building blocks, known as amino acids. (C) Scientists have long looked to life on the earth to guide their search for life in other worlds.

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Question:Starfish, sequoias, salamanders and the rest of the earth's residents may seem very diverse, but they are surprisingly similar on the molecular scale. ---- Planets and moons that have hints of liquid water have been ranked high on the list of potential sites for life-detection missions. (A) All species that scientists have studied need liquid water to survive, for example. (B) Further they all rely on DNA to carry genetic information, and they all use that information to build proteins from the same set of building blocks, known as amino acids. (C) Scientists have long looked to life on the earth to guide their search for life in other worlds.

1.Only A

2.A and B

3.Only B

4.All the three

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  1. Starfish, sequoias, salamanders and the rest of the earth's residents may seem very diverse, but they are surprisingly similar on the molecular scale. ---- Planets and moons that have hints of liquid water have been ranked high on the list of potential sites for life-detection missions. (A) All species that scientists have studied need liquid water to survive, for example. (B) Further they all rely on DNA to carry genetic information, and they all use that information to build proteins from the same set of building blocks, known as amino acids. (C) Scientists have long looked to life on the earth to guide their search for life in other worlds.
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