Spontaneous generation has been offered as an explination for

What did Pasteur do in his experiments on spontaneous generation that other scientist before him had not?

The age of Earth is estimated to be

If the half-life of a radioactive isotope is 5,000 years, how much of the radioactive isotope in a specimen will be left after 10,000 years?

Isotopes are forms of the same element that differ in

Miller and Urey did not use oxygen gas in their apparatus because oxygen

RNA

RNA

Scientist think that the first cells resembled modern

Which of the following is true difference between photosynthetic organisms and chemosynthetic organisms?

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