Which of the following is most likely responsible for the fact that organic molecules no longer formed spontaneously on earth?
a. the amount of uv radiation increased
b. the amount of oxygen in the atmosphere increased
c. water accumulated in the oceans
d. earth's surface temperature warmed

What is a codon and where is it found

Osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? view available hint(s)osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? the first law of thermodynamicsthe difference in the height of water columns on either side of a selectively permeable membranethe difference in water concentration across a selectively permeable membranethe difference in sugar or ion concentration across a selectively permeable membrane

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above