That a man can take pleasure in marching in formation to the strains of a band is enough to make me despise him. He has only been given his big brain by mistake; a backbone was all he needed.
In microbiology the roles of mutation and selection in evolution are coming to be better understood through the use of bacterial cultures of mutant strains. - Edward Tatum
Listen, can you hear it? Spring's sweet cantata. The strains of grass pushing through the snow. The song of buds swelling on the vine. The tender timpani of a baby robin's heart. Spring. - Diane Frolov and Andrew Schneider