Stimulation of muscle fibers at a rate of 20 to 40 stimuli per second does not allow for complete relaxation of the fibers before the next stimulatory event. this results in and can lead to incomplete tetany.

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.

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?

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?