is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.
A.
Transcription
B.
Translation
C.
Crossing over
D.
Fertilization

Crossing over is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

the answer is "a.) well–developed vascular system."

explanation: