Which nitrogenous base is part of an rna molecule but not a dna molecule?
a. guanine
b. cytosine
c. adenine
d. uracil

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

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.

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel