Which of the following plants best represent a climax community?
a. Grasses, small herbs, and forbs
b. Shrubs and fast growing trees
c. Shade-intolerant trees
d. Shade-tolerant trees
Answer: D
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The hang time of an athlete who moves horizontally 2.0 m during a 1.25-m high jump is
A. about 1 s. B. less than 1 s. C. more than 1 s. D. need more information
Because S-waves do not travel through Earth's outer core, scientists inferred that the outer core is
A. solid. B. molten liquid. C. very dense. D. impenetrable.
The Greek word Geographica means "earth description" and was first coined by ________, who at the time was the director of the library at Alexandria
A) Erastosthenes B) Hipparchus C) Polymethus D) Cadmus
Which of the following materials has moderate to high porosity but low permeability?
A. fractured sandstone B. uncompacted clays C. well-sorted sand D. well-sorted gravel