Slab pull and ridge push facilitate the movement of plates.
a. true
b. false
a. true
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A ___________ pesticide does not degrade after being sprayed and remains in the environment for years causing long-term problems.
Fill in the blank(s) with the appropriate word(s).
What are groundfish?
A) various species that are found in estuaries B) fish that are ground up and used for bait C) fish that form the base of the food web of deep?water habitats D) various species that live in benthic habitats, such as halibut and flounder E) various species that live in littoral habitats, such as tuna and whitefish
Which of the following have been associated with prolonged treatment with drugs such as Premarin or Provera?
A) an increased risk of breast cancer B) an increased risk of heart problems C) both a and b D) neither a nor b
The point in stellar evolution when a star has used up all its fuel and is radiating away its remaining thermal energy as light is the ________ stage
A) black hole B) main-sequence star C) white dwarf D) red giant