A rabbit gives birth to 3 phenotypic variations of rabbits( white, brown and black). This is an example of which of Darwin's natural selection criteria?

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."

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

the answer

b.) bowling ball