When all the precipitation in a small valley feeds a particular stream, the valley is referred to as ____.
A. a basin
B. a waterway
C. an ecosystem
D. an aquifer
E. a watershed
Answer: E
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The tapetum lucidum is a key adaptation to
A. visual function in the deep sea. B. visual function in fast moving predators. C. visual function in brightly lit shallow marine waters. D. visual function in prey species that require wide fields of vision. E. visual sensitivity in nocturnally active animals.
Most peptic ulcers are caused by ____
a. antibiotics b. bacteria c. heartburn d. lactose intolerance e. malnutrition
The evaporation of water from internal surfaces of leaves, stems, and other living parts of a plant is called
A) osmosis. B) transpiration. C) diffusion. D) infiltration.
All of the following were likely present on the primitive Earth during the evolution of self replicating molecules EXCEPT
A. amino acids and nucleotides B. nitrogen C. simple carbohydrates D. freestanding liquid water E. an O2 rich atmosphere