In order for the parts in a system to work correctly, the parts must be arranged or built upon in a particular order. What is the correct order of the parts of a human body system from simplest to most complex? ORDER THEM IN THE CORRECT ORDER! tissue
organ
organ system
cell

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.