Which of the following is an unanswered question about life on Earth? A.How long has life existed on Earth? B.What were early forms of life like? C.Did early life arise spontaneously or did it come from space? D.How does evolution occur?

THIS USER ASKED 👇

Which of the following is an unanswered question about life on Earth? A.How long has life existed on Earth? B.What were early forms of life like? C.Did early life arise spontaneously or did it come from space? D.How does evolution occur?

THIS IS THE BEST ANSWER 👇

Did early life evolve spontaneously or did it come from space? -and an unanswered question about life on Earth.