Which of the following is not true of soil texture?
A) It can be modified substantially by humans.
B) It exerts a major control on the soil's fertility, stability, and other properties.
C) It describes the size distribution of the particles in a soil.
D) It can be described using a triangular plot of the percentage of sand, silt, and clay.
A) It can be modified substantially by humans.
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The world's agricultural hearth areas are those regions
A) from which the core gets most of its food. B) where an agricultural surplus is produced. C) where plants and animals were domesticated. D) where swidden cultivation is practiced. E) where industrial agriculture is most prominent.
Which of the following best matches the description?Converts light energy directly into electricity.
A. resources B. liquefied natural gas C. overburden D. renewable energy sources E. reserves F. acid mine drainage G. photovoltaic cell H. geothermal energy I. secondary recovery J. black lung disease K. passive solar system L. active solar system M. underground mining N. nonrenewable energy sources O. surface mining
How are jalousie windows normally opened and closed?
a. pulling the chain attached to the drum b. sliding the sash within the frame c. turning a small hand-crank d. using a remote operated electric motor
A variety of oranges that have been selectively bred to be juicer and sweeter are a result of
A. natural selection. B. artificial selection. C. adaptation. D. reproductive isolation. E. differential reproduction.