Will give brain list if correct
as impalas graze, birds perch on their backs and eat ticks from the impalas costs, preventing them from being bitten. this is an example of which of the following?

a. competition

b. parasitism

c. commensalism

d. mutualism

C

Explanation:

The answer is C, Commensalism.

Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.

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."