Critics of evolution often cite the fact that several hypotheses are being tested to help explain various stages of the origin of life. Explain how having several hypotheses for the evolution of monomers does not negate the fact that evolution of monomers was the first stage in the evolution of life?

Select the true statements from the following regarding the evolutionary theories that are thought to have combined to give rise to life on earth.     Reproduction is required for both chemical and biological evolution.     Both chemical and biological evolution are defined by change over time.     Purpose of Miller-Urey experiment was to answer the question: can chemistry give rise to complex molecules required for life?     The Miller-Urey experiment showed that chemistry can give rise to the molecules required for evolution of life.

Radiometric dating is a technique used to determine the age of rocks. Geologists have used this technique to determine that:   A. The universe started with the "Big Bang."   B. Earth is about 6.2 trillion years old, and life appeared on Earth about 4.9 trillion years ago.   C. Earth is about 4.6 billion years old, and life appeared on Earth about 4.1 billion years ago.   D. Earth is about 4.6 million years old, and life appeared on Earth about 4.4 million years ago.   E. Earth is about 6.2 thousand years old, and life appeared on Earth about 6 thousand years ago.

Explain Oparin-Haldane theory of chemical evolution of life.