Which statement summarizes Kepler's First Law of Planetary Motion? Planets in the solar system revolve around the sun.

Planets revolve around the sun in elliptical orbits.

Planets move fastest while Earth is at perihelion.

Planets closest to the sun move faster in their orbits than those farther away.

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."

sorry, but you do not have posted the diagram.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).