The humpback whale is a large marine mammal that lives wide spread throughout the North Pacific Ocean. Barnacles are small marine crustaceans that will attach themselves to the bodies of humpback whales. Though the barnacles grow on the skin of whales to filter feed, they are too small to harm the whale. This example best defines which of the following commensalism

mutualism

parasitism

predation

commensalism

Explanation:

the barnacles benefit from the whale while the whale doesn't but the whale isn't harmed either

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."