IM TAKING AN EXAM PLEASE HELP ME R what are two samples of DNA that are needed in order to identify the DNA as belonging to a specific person?

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

What do nitrifying bacteria convert

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi