Which type of transport is the transport of materials along a concentration gradient from high to low concentrations? a. active transport b. vesicle transport c. passive transport d. all of the above.

Transport of materials along a concentration gradient from high to low concentrations is called passive transport

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."