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).
Cards issued by Visa and Master Cards have 16 digits number. If the card starts with 4, its issued by Visa. If 5 then by Master Card. The 2nd through 6th digits are the issuer bank number. And the 7th-15th numbers are individual's account number. The 16th digit is known as the âcheck digit,â which is used to help determine whether or not the overall number is legitimate. Then, there is the 3 digit CVV code, which is at the back of the card.