When a farmer breeds only his or her best livestock, the process involved is A. natural selection
B. selective breeding
C. survival of the fittest
D. artificial variation

How does litmus paper indicate an acid?

What four properties do all waves have in common

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.