envelope


The nuclear membrane, also known as the nuclear envelope, is the outer covering of the nucleus. The nuclear membrane separates the nucleus from the cytoplasm and helps to protect its.



Envelopes are for sending flat, flexible things, like letters, cards, checks, forms, and other paper goods. For just 1 $0.63 First-Class Mail ® Forever ® stamp, you can send 1 oz (about 4 sheets of regular, 8-1/2" x 11" paper in a rectangular envelope) to anywhere in the U.S.! Show More