Phytoremediation is
a. rotating crops so that soil minerals are replenished.
b. replacing eroded topsoil so that plants can grow in the soil again.
c. plowing under all or parts of crops to improve the soil.
d. the use of plants to remove pollutants from the environment.
e. replacing unwanted plants with plants useful to humans.
D
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Identify the closed system in the following list
a. a human b. a gas-powered automobile c. a single-celled organism d. a propane furnace e. the Earth
Plasma approximately makes up what percent of the total blood volume?
a. 10 percent b. 25 percent c. 50 percent d. 75 percent e. 90 percent
The Hubbard Brook Watershed project measured all of the following EXCEPT
a. amount of energy used by consumers. b. amount of nutrients washed away by streams. c. nutrient input. d. precipitation. e. uptake of nutrients by plants.
Which of the following does NOT influence
the pH of extracellular fluids? a. respiration b. a high protein diet c. bicarbonate ions d. filtration by glomerulus e. phosphate and ammonia ions