The female gametophyte structure that produces eggs in nonvascular plants are called archegonia. The male structure that produces sperm are called antheridia. A gametophyt â¦ e is the part of the plant that is responsible for creating gametes AKA sexual reproductive cell (sperm or egg).
All American Express cards begin with '37,' followed by currency indicator (digits 3, 4), account number (digits 5-11), card number within account (digits 12-14), and check digit (digit 15).
American Express cards have a four-digit CVV located on the front of the card, just above and to the right of your account number. For all four card issuers, the CVV is printed on the card, rather than embossed. At first glance, itâs hard to see how CVV numbers help keep online transactions secure.