In an experiment on the effects of deforestation of a portion of a northern temperate deciduous forest, all the trees were removed from a small mountainside watershed area and herbicides were applied for three years to prevent regrowth. Measurements of the concentration of calcium (an important nutrient) in runoff water were taken both before and after the deforestation. Monthly measurements also were made in a similar watershed in another part of the same forest that had been left undisturbed. The findings are displayed in the graph below. (There is an image in your packet #101-105) 2002 test Which of the following factors affecting the hydrologic cycle would have the LEAST impact on calcium loss from the disturbed watershed?
(A) Total precipitation
(B) Surface runoff
(C) Evaporation
(D) Transpiration
(E) Porosity of soil
Ans: (D) Transpiration
You might also like to view...
Which saliva component keeps the mouth pH between 6.5-11.5?
a. mucin b. salivary amylase c. water d. pepsin e. bicarbonate
Which biome receives the lowest annual rainfall?
A) Tropical deciduous forest B) Tropical rain forest C) Chaparral D) Desert E) Savanna
Receptor tyrosine kinases (RTKs) are found at high levels on various cancer cells. A protein, Herceptin, has been found to bind to an RTK known as HER2. This information can now be utilized in breast cancer treatment if which of the following is true?
A) If Herceptin is found in the breast lymph nodes of the patient. B) If HER2, administered by injection, is in sufficient concentration. C) If the patient's cancer cells have detectable HER2. D) If the patient's genome codes for the HER2 receptor. E) If the patient's genome codes for the manufacture of Herceptin.
If you compare a bacterium and a eukaryote of the same genome size,
a. the bacterium likely has more insertion elements. b. the bacterium likely has more genes. c. the eukaryote likely has more metabolic pathways. d. all of the above are true.