Which of the following proteins has an extended helix secondary structure?
A) collagen
B) keratin
C) silk
D) none of these
A
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Which of the following explains why advection fog is more likely to form at headlands than at beaches along an irregular coastline?
A. the occurrence of converging surface winds and rising air B. the occurrence of diverging surface winds and sinking air C. the occurrence of converging surface winds and sinking air D. the occurrence of diverging surface winds and rising air
What is the main problem facing Ogallala aquifer?
a) overpumping may cause southern parts of the aquifer to go dry in the next 100 years b) it has become contaminated with radioactive waste from the Chernobyl accident c) precipitation is heavier to the east, causing tilting of the entire formation d) leakage from chemical processing plants are polluting the entire aquifer e) the groundwater is becoming more salty from water from the pacific Ocean
Korea is a good example of a(n)
A) sovereign state. B) nation-state. C) ethnicity divided between more than one state. D) colony. E) patron-state.
A plant that is unable to extract needed water from soil has reached its
A) field capacity. B) permeability. C) wilting point. D) porosity.