The standard deviation of a sample taken from population a is 17.6 for a sample of 25. the standard deviation of a sample taken from population b is 21.2 for a sample of 30. the standard deviation of the sample mean differences is round your answer to the nearest hundredth.

Me with these questions if you’re it sure don’t answer

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression. c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression. d-neelaredoxin is only produced when there is exposure to o2 or h2o2.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat