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 numbers are 15 digits and start with 34 or 37. 3[47] matches the first 2 digits, and \ d{ 13} matches the remaining 13 digits. Discover uses a simple pattern. All Discover cards are 16 digits and start with digits 6011; 6011\ d{ 14} does the trick.