Both glycerophospholipids and sphingolipid structures are asymmetrically distributed in the two layers of the phospholipid bilayer. Sphingolipids are membrane lipids that have a ceramide backbone while glycerophospholipid has glycerol present in its membrane lipids. Sphingolipids may or may not be present.
The solid Earth, the largest of Earth's four major spheres. The thin, rocky outer layer of earth and is divided into oceanic and continental crust.
I'd have to say either 1 or 3. I would choose number 3.
C. Meiosis. Meiosis reduces the number of sets of chromosomes from two sets (diploid) to one set (heploid)
