In primary production ________
A) carbon dioxide is released into the water
B) oxygen is utilized by plants
C) oxygen utilized by animals is less than the oxygen consumed by autotrophs
D) proteins are made by animals
E) there is a net gain in organic carbon by organisms
E
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The distance from Earth's center to its outer surface (that is, the radius of the solid Earth) is approximately
a) 637 km b) 6,370 km c) 63,700 km d) 637,000 km e) 6,370,000 km
What happens if a rock is strained beyond its elastic limit? What will be an ideal response?
That the northern continents were once joined and located along the equator was shown by the:a
coal-age plant fossils of North America and Europe. b. Glossopteris flora. c. distribution of mountain ranges. d. distributions of Permian and Triassic reptiles. e. distributions of northern hemisphere glacial tillites.
Rowland and Molina's work showed that ultraviolet light in the stratosphere causes CFCs to release ________ atoms
A) chlorine B) hydrogen C) fluoride D) carbon E) mercury