Which best describes the purpose of a controlled experiment? A)to make sure the results of the experiment support the hypothesis B)to prevent a dangerous condition resulting from a reaction C)to examine whether one variable causes a change in another D)to prevent an undesired change in a variable

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

What is the compliment dna strand to the following sequence: ttgactaggcta

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.