question: "i would much rather climb into an airplane piloted by a chain-smoker than one piloted by a smoker deprived of cigarettes for a number of hours - not allowed to smoke during flight," he ended his warning in 1976 - and subsequently the proposal of a smoking ban among pilots was dropped.
Capitalize this past sentence correctly.
A: "I would much rather climb into an airplane piloted by a chain-smoker than one piloted by a smoker deprived of cigarettes for a number of hours - not allowed to smoke during flight," he ended his warning in 1976 - and subsequently the proposal of a smoking ban among pilots was dropped.

question: if the cell accepts the new dna, a duplicate embryo is formed. however, the embryo cell may reject the new dna and die. also, it is very possible that the embryo may not survive having the original genetic material removed from its nucleus.
Capitalize this past sentence correctly.
A: If the cell accepts the new DNA, a duplicate embryo is formed. However, the embryo cell may reject the new DNA and die. Also, it is very possible that the embryo may not survive having the original genetic material removed from its nucleus.

question: mesons are required to have quarks of two different colors.
Capitalize this past sentence correctly.
A: Mesons are required to have quarks of two different colors.