What can hinder photosynthetic productivity in the open ocean?
A) Light
B) Carbon dioxide
C) Iron
D) Conservative nutrients
C
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Which of the following might best explain the reason why electrons are restricted to certain energy levels in an atom?
A) They behave like restricted waves and are self-reinforcing. B) They are travelling at very high speeds. C) They are interacting with the light around the atom. D) They are out of phase and self-destruct when outside of distinct energy regions. E) They behave like chaotic waves of alternating frequency.
Why is Mount Etna in Sicily an important place for geology?
A) It is very calm, showing the serenity of the earth. B) It is a famous underwater volcano. C) It is a famous mountain for geologists to climb. D) It is an active volcano, showing that the earth is a dynamic place.
A(n) ________ is a structure in which the oldest rocks are located in the center
A) anticline B) syncline C) dome D) basin
The branch of soil science that studies soil as a medium for sustaining the growth of higher plants is known as
A) pedology. B) geology. C) edaphology. D) geomorphology.