One type of early protocell (pre-cells) probably consisted of small droplets of
A) water
B) clay
C) concentrated amino acids
D) nucleic acids
C
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A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. It has a speed of 100 m/s and is fired at an angle of 35.0° below the horizontal. How far from the foot of the vertical cliff does the projectile hit the water?
A) 79.1 m B) 312 m C) 684 m D) 1084 m E) 540 m
A composite volcano is formed by
A) successive flows of fluid basaltic lava. B) a mixture of rock and lava. C) alternating layers of lava, ash, and mud flow debris. D) the accumulation of ash, cinders, and rock debris.
How does the solar nebula theory explain the present densities and chemical compositions of the planets?
What will be an ideal response?
Radioactivity Basics: Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?
A. alpha B. beta-minus C. beta-plus D. gamma E. x-rays.