Water transport from roots to leaves occurs mainly because of _____
a. pressure flow
b. differences in source and sink solute concentrations
c. the pumping force of xylem vessels
d. transpiration, tension, and cohesion of water
e. pressur flow and differences in source and sink solute concentrations
D
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A provision that permits raising tariffs if domestic producers are suffering under an existing tariff is known as
a. a trading bloc. b. exchange control. c. anti dumping. d. an escape clause.
A gradual change in phenotype across an environmental gradient, such as white-tailed deer changing gradually in size from large in the north to small in the south, is referred to as
A) migration. B) a subspecies. C) a cline. D) an ecotype.
Which behavior is developed through experience for the wasp Philanthus?
a. How to kill bees b. How to dig a burrow c. How to locate the burrow d. How to cover a burrow e. How to capture a bee
Humans differ from other animals, such as dogs and bears because humans are macrosmatic and other animals are microsmatic
Indicate whether the statement is true or false.