Multiple Choice
Which of the following was produced in experiments on primitive Earth conditions conducted by Miller-Urey and others?
A) ammonia and water
B) amino acids
C) CO2 and H2O
D) ammonia and hydrogen sulfide
Correct Answer:

Verified
Correct Answer:
Verified
Q2: A scientist is studying endosymbiosis in cells.This
Q5: If a scientist found very high concentrations
Q9: Eukaryotic cells acquired mitochondria and chloroplasts by<br>A)endosymbiosis.<br>B)exocytosis.<br>C)pinocytosis.<br>D)mutation.
Q11: During the snowball earth temperatures at the
Q13: Vascular plants appeared about 450 million year
Q16: The early Earth's reducing atmosphere probably contained
Q19: Why is there free oxygen in the
Q20: How did humans colonize the New World?<br>A)Early
Q21: A scientist is analyzing air bubbles trapped
Q23: Two principal organelles in eukaryotes that were