Choose the best match for: "vitamins in the intestine" a. problem caused by bacteria b. a problem caused by viruses c. bacteria

Which of these statements are true about scientific theories and hypothesis

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic