Biodiversity affects the sustainability of an ecosystem by — A. always increasing competition for limited resources within the ecosystem.
B. allowing the ecosystem to survive many changes.
C. preventing the ecosystem from surviving many changes.
D. always decreasing competition for limited resources within the ecosystem.

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

Debris produced by mining is called