Which is characteristic of a mineral? a. it must be man-made and amorphous. b. it must be man-made and crystalline. c. it must be naturally occurring and amorphous. d. it must be naturally occurring and crystalline.

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.

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?