What type of selection is probably involved when organisms that exhibit one extreme of a trait distribution (such as height, weight, etc.) have a better chance of survival than those organisms exhibiting the opposite extreme of the same trait?

MCQs on the structure and function of DNA and RNA and how these nucleic acids are used to form proteins, and their importance in genetics and inheritance. Also covers DNA replication, transcription, gene expression, mutation and repair, recombination, molecular techniques, and appropriate molecular models.