Which of the following is reduction?
A) gain of electrons
B) gain of hydrogen
C) loss of oxygen
D) all of these
D
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Identical waves superimposed out of phase produce a wave of decreased
A. frequency. B. amplitude. C. wavelength. D. all of the above
?An ecological footprint is the amount of biologically productive land and water required to supply a population in an area with renewable resources and recycling of wastes and pollution.
Answer the following statement true (T) or false (F)
Organisms, such as algae and bacteria, that drift with ocean currents are known as ________
A) plankton B) benthos organisms C) nekton D) biomass E) none of these
Based on its alluvium characteristics and surrounding landforms, Death Valley is a common example what type of desert terrain?
A. erg B. basin-and-range C. hamada D. playa E. mesa-and-scarp