fight harmful or poisonous substances including alcohol and formal dehydrate. Occasionally, the immune system loses its ability to distinguish friend from foe, that is to tolerate self antigens, while still recognizing and attacking foreign antigens. This puzzling phenomenon is called .

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.

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations