Which will most likely cause variations to occur within a species

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.

Describe five factors that influence the value of fuel

The organelle pictured is found in cells of and is theorized to have once been an independent organism.