Agroup in which the variable is not changed in an experiment is called

Dna is the genetic material that makes up living things, and folic acid plays an important role in the information of dna. jon wants to study the effect of folic acid on dna formation in microbes. which statement accurately describes the variables in this study

Which of these statements are true about scientific theories and hypothesis

Apart of an ecosystem that can restrict the growth of a population is referred to as