Should the rungs on a ladder always be horizontal when in use?

Which target organ is NOT affected by the parasympathetic division of the autonomic nervous system ANS? Which synthetic fiber contain the organic group similar to those which gives fruit their sweet smell? How did Venice get underwater? What is the importance of producers in an ecosystem? What are the differences between natural radioactivity nd artificial radioactivity? Name the two major branches of biology? What flowers have two lips? How many kg equal in 1m3 wood? What is chloroprene used for? What is the function of stems and branches in a plant? What term describes the plasma membrane because of its oily nature and embedded proteins? Can a magnet pass through water? Which terms describes the process of breaking down of sugar or other organic compounds in the absence of oxygen which generates ATP and produces organic acids or alcohol? What microorganisms are very small and aren't made of cells? Importance of graphical methods for analysing an experiment? Can rotate text counterclockwise by entering a number between 1 degree and 180 degree on the Alignment sheet in the Format Cells dialog box? What are the 4 conditions of homeostasis? ONE MOLE OF AN IDEAL GAS EXPANDS TO twice its original volume in free expansion what is entropy change of gas? Are fox gloves poisons? Which is better pcb or pcm?

Should the rungs on a ladder always be horizontal when in use?