An idea that has been repeatedly tested and becomes widely accepted is a
a: fact b: law c: theory d: hypothesis

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."

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

silty loam

hope this

the contamination

we are putting to many trash.