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

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

How does the solar nebula theory explain the present densities and chemical compositions of the planets?

What will be an ideal response?

Physics & Space Science

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.

Physics & Space Science