The Miller and Urey experiment shows that complex organic molecules
A. may have formed in hydrothermal vent habitats on early Earth.
B. were probably brought to Earth by meteorites.
C. may have been formed when lightning storms occurred on early Earth.
D. may have been generated in volcanoes on young Earth.
Answer: C
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Greenhouse gases
A. warm the earth's lower atmosphere. B. are vital human nutrients. C. block all ultraviolet radiation from reaching the earth's surface. D. cause the earth's rotation on its axis. E. create rain.
What are the three types of rays produced in radioactive decay? Which will penetrate farther into material?
What will be an ideal response?
Which map project preserves the property of true shape?
A) aphylatic B) equivalent C) conformal D) proximal E) equidistant
Earth's biodiversity is evenly spread across the planet
Indicate whether the statement is true or false