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).
In the signature box or just to the right of it, you will see a series of digits. However long the series, the final three digits are the security code. American Express cardholders can find their security code on the front of the card, either to the left or right of the embossed 15-digit card number. These four digits are printed in black, not embossed.