What are the four nitrogenous bases in dna?

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.

Which of the following statements are true chromosomes make up genes

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley