Which of the following factors is not significant in determining the effectiveness of a microbial treatment?
group of answer choices

the toxins secreted by the microbe being treated.

the concentration of the treatment.

the susceptibility of the microbe to the treatment.

the length of exposure to the treatment

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere