The protein structure that twists like a helix or folds over on itself like a flat sheet
primary structure
seondary structure
tertiary structure
quaternary structure

Which of the following mining methods disrupts the sea floor?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.