Quote by Thomas Hunt Morgan
"Variation provides the clay; natural selection provides the sculptor."
More from Thomas Hunt Morgan
"In each human being there is some possibility of development, and this possibility should be regarded as a sacred trust."
"The science of genetics has revealed to us the great truth that inheritance is the fundamental basis of life."
"Facts are the air of science. Without them you never can fly."
"The organism is not merely the sum of its parts; it is a unified whole."