Answer:
The Cold War (1947 to 1991)
Explanation:
Have a good day :)
(I still don't know why they called it the Cold War)
C the increased outside contact due to the crusades
Answer:
B. They form cell membranes
Explanation:
There's not really an explanation, that's just a fact. A phospholipid bilayer has two layers of, yep, phospholipids. They stay together well and kind of move around a little, allowing small particles to pass through. There are some proteins in them also that help them function as cell membranes.
