Chapter 21.2, Problem 1HYEW

If you like sushi, you’ve probably eaten a sushi roll, in which rice and other foods are surrounded by a tasty, blackish-green wrapper. The wrapper is made from the dried bodies of a multicellular protiit, the red alga Porphyra. Porphyra, also known as nori, is grown commercially, often in large coastal “farms” where the seaweed grows attached to vast nets tint extend down from the ocean’s surface. After harvest, the seaweeds are shredded, pulped, pressed into sheets, and dried, in a process very similar to papermaking.

What Sushi Wrappers Are Made of?