A) Rich coal deposits found in rocks of this age.
B) The first examples of gymnosperms on land.
C) The first angiosperms developed.
D) The carboniferous explosion of marine invertebrates; sea urchins, arthropods, and crustaceans.
E) The appearance of reptiles and large mammals.
G) A) and B)
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Correct Answer
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A) Mix some RNA nucleotides in water and heat them to boiling temperatures.
B) Mix some amino acids (protein building blocks) in water and add a strong acid or a strong base.
C) Mix some RNA nucleotides in water and repeatedly wet and dry them on clay.
D) Mix some amino acids (protein building blocks) in water and add a bacterium harmless to humans.
E) Mix some amino acids in salt water and cool down to 0C.
G) B) and C)
Correct Answer
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Correct Answer
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