If a person drinks a large quantity of water, he would _______ production of ADH, which would ______ the permeability of the collecting duct
a. not affect; leave unchanged
b. increase; increase
c. increase; decrease
d. decrease; increase
e. decrease; decrease
E; ADH prevents loss of water by increasing the permeability of the collecting duct, allowing water to leave the urine and return to the circulation. In this case, the person has excess water and needs to unload some. Therefore the ADH levels will drop, the collecting duct will become less permeable, and more urine will flow into the bladder.
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One of the ways agricultural production of such fruits as tomatoes or cucumbers can be increased significantly is to grow them in:
A. soils rich in magnesium B. soils rich in nitrogen C. greenhouses supplied with extra carbon dioxide D. greenhouses with extra oxygen E. None of these is true
Soil nutrients that are leached from soils into ponds or other bodies of water can contribute to such phenomena as: (Check all that apply)
_____ Reduced production of water plants _____ Excess growth of certain algae _____ Increased nutrients for land plant growth _____ Reduced fertility of soils
The flowering plants and gymnosperms differ from other plants by ____
a. possession of vascular tissue b. presence of nonmotile gametes c. presence of two types of spores d. dominance by the diploid generation e. production of seeds
Darwin found that many of the species on the Galápagos Islands
A) resembled species on the nearest mainland. B) resembled species in Europe. C) resembled species from Australia. D) were identical to South American species.