Which of the following is the effect of El Niño?
A. More nutrient-rich cold water wells up along South America’s west coast
B. Western Pacific waters cool
C. Less rain in western South America
D. Easterly trade winds weaken or reverse
E. More rain in Australia
Answer: D
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Which of the following is TRUE when comparing solutions with a pH of 6 and a pH of 8?
A. The solution with a pH of 8 has a 100 times higher concentration of hydrogen ions than a solution with a pH of 6. B. The solution with a pH of 8 has a 2 times higher concentration of hydrogen ions than a solution with a pH of 6. C. The solution with a pH of 8 has a 100 times lower concentration of hydrogen ions than a solution with a pH of 6. D. The solution with a pH of 8 has a 2 times lower concentration of hydrogen ions than a solution with a pH of 6. E. The hydrogen ion concentration does not appreciably differ between a solution with a pH of 8 versus that with a pH of 6.
The p700 photosystem is designated as photosystem
“I” because it a. absorbs light energy first. b. absorbs more energy than photosystem II. c. is the primary photosystem. d. is thought to have evolved first. e. obtains electrons before photosystem II.
Solutions are always comprised of
A. solvents and solute. B. liquids and solids. C. water and salts. D. compounds and ions.
Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.
Answer the following statement true (T) or false (F)