4.6 billion years ago
The study pushes back the clock on the origin of Earth's water by hundreds of millions of years, to around 4.6 billion years ago, when all the worlds of the inner solar system were still forming. Scientists had suspected that our planet formed dry, with high-energy impacts creating a molten surface on the infant Earth.
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it can’t survive the vacuum of space, zero temperatures and radiation and the DNA may be the missing link to long distance space travel
one species using another as a food source, typically killing it
Answer:
B. C-G and A-T
Explanation:
The pairings are adenine and thymine and cytosine and guanine
