Why is the rough endoplasmic reticulum so rough?

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?