Which of the following describes how biodiversity contributes to the sustainability of a natural environment?
a. logging allows for the collection of firewood in the mountains of southwest china.
b. non-native alligator weed forms dense mats that crowd native species in california.
c. mining in the guinean forests of west africa provides diamond and gold jewelry for humans.
d. giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the california grasslands.

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

Aparticle moves according to a law of motion s = f(t), 0 ≤ t ≤ 12, where t is measured in seconds and s in feet. f(t) = cos(πt/6) (a) find the velocity at time t (in ft/s).

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc