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).
The 4- digit Commonwealth Bank American ExpressÂ® Card code is located on the front of the card, above the card number on the right hand side. With a MasterCardÂ® or Visa card, the 3- digit number is located in the signature panel on the back of the card. The 3 or 4 digit code uniquely identifies that a card number quoted to a merchant was obtained from a genuine credit card therefore providing merchants with an increased level of protection against fraud.