Photosynthesis _______.
Fill in the blank(s) with the appropriate word(s).
Answer: results in carbon fixation
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Faults that generate earthquakes ____
a. ?are separated by empty areas free of faults b. ?zig-zag across terrain, separating into fault segments at each bend c. ?are split into segments by cross faults d. ?are separated into segments by sedimentary layers e. ?are separated into segments by construction and highways
In organic compounds, which of the following elements normally forms three covalent bonds?
A) carbon B) hydrogen C) nitrogen D) oxygen
Where is stream gradient usually greatest?
A. headwaters B. between the headwaters and the mouth C. mouth
The average global surface air temperature since the since the late 1800s has risen by more than ____
a. ?0.2°C b. ?0.4°C c. ?0.5°C d. ?0.8°C e. ?1.2°C