Why is soil erosion important to agriculture?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Why is it important to study each branch of earth science?

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna