The fact that every organism in a biological community has a distinctly separate niche is largely the result of
A) abiotic factors: soil chemistry, temperature, and moisture.
B) competition among many species for limited resources.
C) seasonal climate changes.
D) the fact that nearly all species live at the limits of their tolerance boundaries.
D
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Which process creates island chains with active volcanoes at one end??
a. ?Asthenospheric convection moves a magma plume under a stationary plate. b. ?Magma plumes form on the Earth’s outer core and rotate under a stationary plate. c. ?Divergent boundaries move plates away from a stationary magma plume. d. ?Convergent boundaries move the location of melting crust under a stationary plate. e. ?Crustal plates move over a stationary magma plume.
A(n) ________ front always slopes back over itself
Fill in the blank(s) with the appropriate word(s).
Combined, alpine glaciers and ice sheets cover about 10% of the Earth's land surface
Indicate whether the statement is true or false
The net effect of wave ________ is to move sand in a series of arcs along the beach face.
A. rip currents B. backwash C. run up and return D. refraction E. oscillation