PCR (select one):
a. Is used to transcribe specific genes.
b. Amplifies specific DNA sequences.
c. None of these are correct.
d. Uses a DNA polymerase that denatures at 55 degrees Celsius.
e. Uses primers that are added only to one of the two template strands.

Option B) Amplifies specific DNA sequences.

Explanation:

Polymerase chain reaction (PCR) refers to the selective and repetitive duplication of a specific DNA sequence. It involves the following: heat, an enzyme called thermos aquaticus and annealing.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.