One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. According to this theory, which of the following events would need to occur first for life to evolve? Group of answer choicesformation of the plasma membraneonset of photosynthesissynthesis of organic moleculesorigin of genetic material

Out of the following, what makes life possible on the Earth?Group of answer choicesphotosynthesishydrogen bondchloride ioncarbon dioxideoxygen

What is currently thought to be the most likely location for the origin of life on Earth? Porous rock around alkali hydrothermal vents, maybe in volcanic ponds. "Primordial soup" in Hadean oceans. Meteorites and/or comets from outer space. Precursor molecules concentrated in clays, which also provided catalytic surfaces. "Primordial soup" in warm, evaporating puddles or tide pools.

What is the most likely reason for the living organisms to appear on the Earth?Group of answer choicesLife arrived from another planetsomeone brought them to the Earthone day all living things just showed up on the Eartha series of random chemical reactionsLiving organisms were a parto f the nebula

The earliest possible time that life could have started is generally believed to be:Group of answer choicesThe beginning of the Archaean eonThe beginning of the Proterozoic eonThe beginning of the Hadean eonThe beginning of the Phanerozoic eon

(Q005) The first life formsGroup of answer choicesprobably occurred in oxygen-rich, shallow, warm ocean waters.may have been simple cells of bacteria or archaea living near hydrothermal vents.date back to 4.3 billion years.required oxygen for respiration.