Which of the following is a secondary protein structure? a) Beta-wall
b) Alpha-helix
c) Epsilon turn
d) Gamma chain

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

How does natural selection change thephenotypes within a population over time?