UV light does not just create repairable dimers in DNA bases, it can and does rip DNA apart. Enough exposure would cause more than enough irreparable damage to kill the cell and 99% of the cell being destroyed is certainly not salvageable.
The Delta flight is cheaper. But check a bag at a cost of $25 for the first checked bag each way on Delta, and your total fare climbs to $256 -- more than the cost of the Southwest flight, which includes free first and second checked bags. Add a second checked bag for $35 each way on the Delta flight, and you'll pay a whopping $326.
Quick Answer. Passengers who fly Delta One, first class and business class on Delta Airlines can check up to two bags of 70 pounds each for free on all flights except for flights to Brazil. On these flights, they can check up to three bags of 70 pounds each for free. Continue Reading.