Kudzu is a fast-growing vine that was introduced to the United States in 1876 as a fragrant, ornamental plant and was later used as a source of erosion control. Kudzu grows especially well in the warm, humid climate of the Southeastern United States. In
fact, it grows so well that it can outgrow and kill off less successful native plants; it can also kill off areas of forest because it prevents forest trees from receiving sunlight. Kudzu can best be described as
A) a keystone species.
B) an invasive species.
C) a source of primary production.
D) an abiotic reservoir.
Answer: B
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Blood pressure that is consistently ________ or higher would indicate that you have hypertension
A) 120/80 B) 140/90 C) 110/85 D) 100/75
If a substance measures 7 on the pH scale, that substance
A) probably lacks OH- ions. B) has a higher concentration of OH- than H+ ions. C) may be lemon juice. D) is basic. E) has equal concentrations of H+ and OH- ions.
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.
Hardy-Weinberg calculations are based on
A) the binomial expansion. B) the quadratic equation. C) the Pythagorean theorem. D) comparing DNA sequences.