which term is used when a microorganism growing on blood agar produces exotoxins that incompletely lyse erythocytes in the surrounding medium

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?