Soil reaction is
a. the measure of the acidity or alkalinity of soil
b. the highest amount of cations soil can absorb
c. determined by the types of minerals in the soil
d. the layering of soil into horizons

What element does susan b. anthony include in this passage to strengthen her argument?

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

This is the interaction of two organisms where one is and the other is neither nor harmed.