In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants.
B. the activities of grazing animals.
C. the precipitation of salt from dry air.
D. the secretion of salt by plants.
E. the settlement and evaporation of water.
E. the settlement and evaporation of water.
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The above figure is a photomicrograph of what
kind of tissue? a. cardiac muscle b. skeletal muscle c. smooth muscle d. cartilage e. dense connective
The weakest symbiotic association, in which one
species simply lives better in the presence of another species is a. commensalism. b. competitive exclusion. c. mutualism. d. facultative obligate mutualism. e. parasitism.
Salinization of water used in irrigation has reduced crop yields by ____
a. 10 percent b. 25 percent c. 33 percent d. 50 percent e. 75 percent
Refer to the paragraph on lymph hearts. What effect would increasing lymph heart pressure have first?
A) Blood volume would increase. B) Blood volume would decrease. C) Hemorrhage would increase. D) Hemorrhage would decrease.