The green house effect makes it possible for life to exist on earth
B is the answer. I repeat B is the answer.
Answer:
Potassium-40
Explanation:
Potassium-Argon dating is the most efficient radioactive dating method in order to determine the absolute age of the fossils. It involves the decay of unstable Potassium-40 (K-40) into a stable Argon-40. The half-life of this Potassium-40 is approximately 1.3 billion years, so it is very much helpful to date the rocks that are of about 4.6 billion years to 100,000 years old.
Thus, the K-40 radioactive isotope would be the best to determine the exact age of the fossil that is found in the rocks that are about 600 million years old.
Answer:
True.
Explanation:
The generation time of that species would determine the time needed for bacteria in the culture to multiply to a sufficiently large number of cells that can be observed as visible colonies.
