Boild water is it convection radiation cunduction or convection

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

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

How can an organ, such as the lungs, work for multiple body systems?