The basic molecular building blocks of DNA and RNA are
A) nucleotides
B) adenosine triphosphate molecules
C) amino acids
D) monosaccharides
A
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Rank the degenerate pressures from least supportive to most supportive:
a. electron, neutron, black hole b. black hole, neutron, electron c. neutron, electron d. electron, neutron
The most important factor which contributed to the thinning of the Martian atmosphere was probably the
A) blasting of gas into space by impacts B) loss of the planet's protective magnetic field as it rapidly cooled C) chemical reactions with surface rocks D) formation of the polar caps
Due to the incredible size of the universe, our search for extraterrestrial life will probably be limited to within our
A) Local Group of galaxies B) Local Supercluster of galaxies C) Milky Way galaxy D) solar system
In the reaction 2Al + 3F2? 2AlF3, the fluorine
a. is reduced. b. loses electrons. c. is oxidized. d. is the catalyst.