In three to five sentences, describe how scientists use deductive and inductive reasoning to support the idea that water on Earth may have come from comets.

Number and variety of living organisms includes genetic, species, and ecological types

What controls activities within a eukaryotic cell?

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