Which of the following has been the primary source of oxygen for the Earth's atmosphere in recent geological times?
A. volcanic eruptions
B. transpiration
C. photodissociation
D. photosynthesis
Answer: D
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Compare the amount of energy emitted as a function of temperature (K). The amount of energy emitted from 200 to 600 K is ________ while the amount of energy emitted from 600 to 1000 K is ________.
A) 0 W/m2; 650 W/m2
B) 73 W/m2; 727 W/m2
C) 100 W/m2; 550 W/m2
D) 200 W/m2; 600 W/m2
Which of the following solutions is the most concentrated?
A) one liter of water with 1 gram of sugar B) one liter of water with 2 grams of sugar C) one liter of water with 5 grams of sugar D) one liter of water with 10 grams of sugar E) They all have the same volume.
A longshore current exists when
A) waves are perpendicular to the shoreline. B) waves approach the shoreline at an angle. C) waves are parallel to the shoreline. D) the distance between wave crests increases.
the collection of genes in an interbreeding population that includes each gene at a certain frequency in relation to its alleles
What will be an ideal response?