Many factors affect soil fertility. One biotic factor would be the
A) mineral content of the soil.
B) moisture content of the soil.
C) number of earthworms in the soil.
D) presence or absence of toxic chemicals.

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

Which measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air

What is likely to happen in the long term if the earth continues to absorb more energy than it emits? a. the earth will discontinue recycling energy. b. organisms will begin to compensate for the change by incorporating more energy. c. the overall temperature of the earth will increase. d. the nutrient cycles will happen more frequently. select the best answer from the choices provided a b c d