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.
Baggage Policy. Singapore Airlines. Free Baggage Allowance-With the exception of travel to/from the US or Canada where 2 pieces of checked luggage at a weight of up to 50lbs each(23kg) is permitted, the free checked in allowance is 44lbs(20kg) total, and an additional 7kg for carry on luggage.ree Baggage Allowance-First checked bag is free, 2nd is $20 CAD max of 50lbs (23 kg) each, and an additional 44lbs (20kg) maximum of carry on luggage within Canada, and for Mexico and the Caribbean.