The Hypothesis That Organic Molecules Formed near the Earth's Surface

Q7: The first photosynthetic organisms to obtain hydrogen

Q39: Shallow seas covered much of the land

Q40: The earliest photosynthetic organisms arose about:<br>A) 3.8-4.6

Q41: The Cenozoic is often referred to the

Q42: Amphibians evolved directly from what ancestral organisms?<br>A)

Q43: Presently, it is thought that organic polymers

Q45: It has been suggested that RNA was

Q46: MATCHING<br>Match the period with the biological events<br>a.Cambrian

Q47: Chemical evolution:<br>A) cannot be investigated experimentally.<br>B) was

Q48: Millions of years ago, the activity of